Physics c mechanics frq 2023

Read Albert's free How to Study for Online AP Exams guide here. Find out more! Dive into intensive exam prep of calculus-based physics and review the many theories and applications of classical mechanics with Albert's AP® Physics C practice questions.

The AP Physics 1 exam includes two main sections - Section 1: Multiple-Choice Questions (MCQs) and Section 2: Free-Response Questions (FRQs). Each section is worth 50% of the total exam score. The exam lasts for a total of 3 hours, with 90 minutes allotted per section. Section 1 of the exam includes 50 multiple-choice questions.Part (c) earned 2 points. The first point was earned for including an upward normal force and a downward gravitational force acting on the sphere.A brief introduction to gravity and Newton's Law of Universal Gravitation for AP Physics C or other calculus-based physics students.For more information, ple...Physics C Mechanics (US) -- International Discussion. Physics C Electricity and Magnetism (US) -- International Discussion. Wednesday May 10. Spanish Language and Culture ... Felt annoying to drill through multiple FRQ’s the day before the exam, get perfect scores on them, ...The 2010 AP Physics C: Mechanics FRQs can... We look at a rotation problem which combines linear and angular quantities as well as some conservation of energy. AP Physics C: MechanicsFree AP Physics C: Mechanics study guides for Unit 2 – Newton’s Laws of Motion. Cram Mode. Guides. Practice. Events. ... ⚙️ AP Physics C: Mechanics. 📌 Exam Date: May 9, 2023. ... Course Overview + Unit 1 Review + FRQ Practice. written by Kristen Adams. AP Mechanics Kinematics Overview.

point ∆ T 2 slope = ( ) ∆ ( N− 1 ) (9.5s 2 − slope 3.5s 2 = ) (0.8 − 0.3) ∴ sl ope = 12 s 2 (c)(iii) (d)(i) Total for part (c) For indicating that the slope would not change with an attempt at a relevant justification For a justification that the period depends on the mass and spring constant which remain unchanged 6 points point... AP Physics C Mechanics Exam and I learned a valuable lesson. I should have ... Don't have to eat humble pie, like me. Copyright © 2013-2023 · All Rights ...Physics C: Mechanics 2023 Free-Response Questions . Begin your response to . QUESTION 1 . on this page. PHYSICS C: MECHANICS SECTION II . Time—45 minutes . 3 Questions Directions: Answer all three questions. The suggested time is about 15 minutes for answering each of the questions, ... Physics C: Mechanics 2023 Free-Response Questions ...This is the regularly scheduled date for the AP Physics C: Mechanics Exam. Your school's AP coordinator can tell you where your exam will be administered. Resources. Article. AP Exams Overview . Get an overview of AP Exams, including exam timing and structure and the best ways to practice.e 7rwdoirusduw d srlqwv)rugudzlqj dqgodeholqj irufh riwkhwhqvlrq wkh h[huwhg glvn rq dq\zkhuhehwzhhq wkh srlqw3dqg wkhohiw hgjh riwkh glvn lqfoxglqj 3dqg ohiw wkhhgjh srlqwriwkh glvn wr wdqjhqw The energy of the object oscillating in simple harmonic motion is a combination of potential energy (elastic energy stored in the spring) and kinetic energy. Simple harmonic motion can be seen in many physical systems, such as a mass attached to a spring, a pendulum, and oscillations of an electric circuit. Any physical system that …214 AP Physics C: Mechanics Exam AP Physics C: Mechanics Exam Regularly Scheduled Exam Date: Tuesday afternoon, May 9, 2023 Late-Testing Exam Date: Friday afternoon, May 19, 2023 Section I Total Time: 45 minutes Calculator Allowed: Number of Questions: 35: Percent of Total Score: 50%: Writing Instrument: Pencil required: Section …ADVANCED PLACEMENT PHYSICS C TABLE OF INFORMATION CONSTANTS AND CONVERSION FACTORS Proton mass, 1.67 10 kg 27 m p Neutron mass, 1.67 10 kg 27 m n Electron mass, 9.11 10 kg 31 m e Avogadro’s number, 23 1 N 0 6.02 10 mol Universal gas constant, R 8.31 J (mol K) < Boltzmann’s constant, 1.38 10 J K 23 k B Electron charge magnitude, e 1.60 10 C ...

We look at a torque problem from the 2008 AP Physics C Mechanics test which not only deals with torques but with some rotational ideas as well. The 2008 AP ...Tuesday May 9. English Language and Composition (US) -- International Discussion. Japanese Language and Culture (US) -- International Discussion. Physics C Mechanics (US) -- International Discussion. Physics C Electricity and Magnetism (US) -- International Discussion. ADVANCED PLACEMENT PHYSICS C EQUATIONS MECHANICS. a = acceleration . E = energy . F = force . f ... Electricity and Magnetism 2023 Free-Response Questions . AP ... Download free-response questions from past AP Physics C: Mechanics exams, along with scoring guidelines, sample responses, and scoring distributions.

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Based on a reddit survey, former students rated the course a 7.4 out of 10 in terms of overall difficulty, placing it as the third most difficult AP course. The top two most difficult courses were AP Physics C Electricity and Magnetism, and AP English Literature. AP Physics C – Mechanics is a relatively small class, with 48,803 entries in ...ADVANCED PLACEMENT PHYSICS C TABLE OF INFORMATION CONSTANTS AND CONVERSION FACTORS 164 | Appendix V.1 AP Pi C MniCours x cription 00762-139-CED-Physics C-Mechanics_Appendixes.indd 164 3/13/19 12:15 PM Proton mass, m. p =1.67 ´10 27. kg. Neutron mass,AP Physics C: Mechanics 2022 Free-Response Questions: Set 2 Author: ETS Subject: Free-Response Questions from the 2022 AP Physics C: Mechanics Exam Keywords: Physics C: Mechanics; Free-Response Questions; 2022; exam resources; exam information; teaching resources; exam practice; Set 2 Created Date: 4/2/2022 11:37:08 AMwritten by Sam Reich. Fiveable is best place to study for your AP® exams. Free AP Physics C: Mechanics study guides for Unit 2 – Newton’s Laws of Motion.The AP Physics 1 exam includes two main sections - Section 1: Multiple-Choice Questions (MCQs) and Section 2: Free-Response Questions (FRQs). Each section is worth 50% of the total exam score. The exam lasts for a total of 3 hours, with 90 minutes allotted per section. Section 1 of the exam includes 50 multiple-choice questions.

Walkthrough of the 2022 AP Physics C Mechanics Set 1 Problems Join My Discord Study Server: https://discord.gg/8WGtt3rLink to the released FRQs:https://secu...Attached below are all of the released official 2023 AP FRQ prompts for each AP Exam! Please note that for some AP exams, only one set of FRQs were released. If your set isn't shown below, that means yours wasn't one of the main forms and/or you did late testing. Monday, May 1, 2023.As for the AP® Physics C: Electricity and Magnetism, 27,000 high school students took the exam. Almost a third also of the students earned a score of 5, that is, 32% of the students. 22.6% of the students earned 4 and 13.5% earned 3. All in all, 68.1 % of the students got a score of 3 or higher. Discover More Details ›.Yes you can! Review any of the MIT OCW materials and grab a textbook. Then Barrons to make sure you know, and of course do every past FRQ. 2. quartersquatgang69 AP Graduate:PhysC M/EM,CHEM,BIO,USH,AB • 1 yr. ago. I had the same background and got a 5 on the AP Physics C Mechanics without studying at all.In this AP Daily: Live Review session for AP Physics C: Mechanics, we will review oscillations and simple harmonic motion for a mass-spring system as well as...Questions 1 and 4 are short free-response questions that require about 20 minutes each to answer and are worth 10 points each. Questions 2 and 3 are long free-response questions that require about 25 minutes each to answer and are worth 12 points each. Show your work for each part in the space provided after that part. Chemical_Beyond_2504 • 23 days ago. For me, mcq was quite ok, but there was no enough time to check back, so I think I have maximun 10 questions wrong for mcq. But frq was holy... I never seen those questions before on any practice exams or past frqs, they definitely change the way or degree of the exam. For frq1, I think I got half correct.Tuesday May 9. English Language and Composition (US) -- International Discussion. Japanese Language and Culture (US) -- International Discussion. Physics C Mechanics (US) -- International Discussion. Physics C Electricity and Magnetism (US) -- International Discussion. Looking at the 2021 AP Physics C: Mechanics Solution for Set #1 Question #2.. I will update this description if any problems are found.For more resources, fe...Physics C: Mechanics 2023 Free-Response Questions . Begin your response to . QUESTION 1 . on this page. ... Physics C: Mechanics 2023 Free-Response Questions ,. = AP ... wait what i thought US and international have the same exam. 2. DragonDSX Phys 1, Calc BC, CS A, Lit, Stats, Phys C, Human Geo • 1 yr. ago. International exams are different forms, generally teachers have access to them and assign them on AP classroom when they get released, but they aren’t available to the public.Apr 20, 2023 · AP Physics 1 Score Calculator. To estimate your potential score on the AP® Physics 1 exam, adjust the sliders below to reflect your performance on the multiple-choice section and the five free-response questions. The score calculator’s curve is based on the most recently available scoring guidelines. Section I: Part A - Multiple Choice. 25 /50.

Aug 17, 2023 · FYI, something cool is coming your way Fall 2023! 👀 Format of the 2024 AP Physics C: Mechanics Exam. Section 1: Multiple Choice (50% of score) 35 questions to complete in 45 minutes. Section 2: Free Response (50% of score) 3 questions to complete in 45 minutes. When is the 2024 AP Physics C Mechanics exam and how do I take it?

2023 AP Exam Administration Scoring Guidelines; Advanced Placement; exam information; scoring information; exam resources; teacher resources; scoring resources; scoring rubrics; non-ADAThinquePrep instructor Joyee Lin works through the AP Physics C Mechanics FRQ from 2021!0:00 - Intro2:00 - Part A3:40 - Part B5:00 - Part C9:00 - Part D11:00...AP® PHYSICS C: MECHANICS 2011 SCORING GUIDELINES Question 3 (continued) Distribution of points (e) 3 points Using the equation from part (b) 2 I T p b = 2 TI224p I 4p b b == For comparing this to part (d) and noting that 4p2 b is the slope of the line 1 point 4 2 m p b = For using the value of the slope determined in part (d) 1 point 22 22 44 ...The AP Physics C Mechanics exam is designed to test your understanding of advanced topics in classical mechanics, such as kinematics, dynamics, etc. The multiple-choice section is 45 minutes long and is worth 50% of your overall score; it consists of 35 questions. The free-response section is 1 hour and 30 minutes long and is worth 50% of your ...AP® PHYSICS C: MECHANICS 2011 SCORING GUIDELINES Question 3 (continued) Distribution of points (e) 3 points Using the equation from part (b) 2 I T p b = 2 TI224p I 4p b b == For comparing this to part (d) and noting that 4p2 b is the slope of the line 1 point 4 2 m p b = For using the value of the slope determined in part (d) 1 point 22 22 44 ...AP Physics C: Mechanics Cram Unit 2: Newton’s Laws of Motion (Dynamics) Slides. S. written by Sam Reich. 🌶️ AP Physics C: Mech Cram Review: Unit 3: Work, Energy, and Power. S. written by Sam Reich. Fiveable is best place to study for your AP® exams. Free AP Physics C: Mechanics study guides for Unit 5 – Rotation.To calculate your likely AP Physics C: Electricity and Magnetism score, use the sliders below to adjust the 1 multiple-choice section and 3 free response questions. The curve for this score calculator is based on the most recently available scoring guidelines. You may also want to check out our AP Physics C: Mechanics score calculator.2022 AP Exam Administration Score Distributions: AP Physics C Mechanics Author: College Board Subject: AP; Advanced Placement; ADA Keywords "2022 AP Exam Administration ; Score Distributions; scoring information; scoring resources; exam information; teacher resources; "; Created Date: 10/5/2022 1:33:40 PM

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Jan 30, 2023 · The energy of the object oscillating in simple harmonic motion is a combination of potential energy (elastic energy stored in the spring) and kinetic energy. Simple harmonic motion can be seen in many physical systems, such as a mass attached to a spring, a pendulum, and oscillations of an electric circuit. Any physical system that creates a ... AP Physics C: Mechanics is a one-semester, calculus-based, college-level physics course, especially appropriate for students planning to specialize or major in one of the physical sciences or engineering. Students cultivate their understanding of physics through classroom study and activities as well as hands-on laboratory work as they explore ...Study Guides by Unit. 🚗 Unit 1 – Kinematics. 🚀 Unit 2 – Newton’s Laws of Motion. 🎢 Unit 3 – Work, Energy, & Power. 🎳 Unit 4 – Systems of Particles & Linear Momentum. 🚲 Unit 5 – Rotation. 🌊 Unit 6 – Oscillations. 🪐 Unit 7 – Gravitation.Study Guides by Unit. ⚡️ Unit 1 – Electrostatics. 🔋 Unit 2 – Conductors, Capacitors, Dielectrics. 🔌 Unit 3 – Electric Circuits. 🧲 Unit 4 – Magnetic Fields. ⚛️ Unit 5 – Electromagnetism.Study Guides by Unit. 🚗 Unit 1 – Kinematics. 🚀 Unit 2 – Newton’s Laws of Motion. 🎢 Unit 3 – Work, Energy, & Power. 🎳 Unit 4 – Systems of Particles & Linear Momentum. 🚲 Unit 5 – Rotation. 🌊 Unit 6 – Oscillations. 🪐 Unit 7 – Gravitation.AP Physics C: Mechanics 2022 Free-Response Questions: Set 2 Author: ETS Subject: Free-Response Questions from the 2022 AP Physics C: Mechanics Exam Keywords: Physics C: Mechanics; Free-Response Questions; 2022; exam resources; exam information; teaching resources; exam practice; Set 2 Created Date: 4/2/2022 11:37:08 AMPhysics C: Mechanics 2023 Free-Response Questions . Begin your response to . QUESTION 2 . on this page. 2. A student conducts an investigation to determine the …A worked out example with a detailed solution of a free response question from the 2018 AP Physics Mechanics exam.Thanks to Physic's teacher, Jacob Bowman, w... ….

2023 AP Daily: Practice Sessions AP Physics C: Mechanics Session 2 – FRQ 1. A 3.0 kg object is moving along the x-axis in a region where its potential energy as a function of x is given as U(x) = 4.0x2, where U is in joules and x is in meters. When the object passes the point x = -0.50 m, its velocity is +2.0 m/s.AP Physics C Mechanics Practice Test 2: Newton's Laws. AP Physics C Mechanics Practice Test 3: Work, Energy, and Power. AP Physics C Mechanics Practice Test 4: Linear Momentum. AP Physics C Mechanics Practice Test 5: Rotational Motion. AP Physics C Mechanics Practice Test 6: Laws of Gravitation.2016 AP Physics C: Mechanics Free-Response Questions ... Session 6 Physics C Mechanics 2023 AP Daily Practice Sessions Created Date: 4/22/2023 2:46:26 PM ...Dec 4, 2016 ... Interested in taking the AP Physics C: Mechanics exam? Read on for a breakdown of the test and CollegeVine's advice for how you can best ...Physics C: Mechanics. Four-function, scientific, or graphing calculator. Allowed. Allowed. Physics C: Electricity & Magnetism. Four-function, scientific, or graphing calculator. Allowed. Allowed. Precalculus. Graphing Calculator. See the complete calculator policy for the new 2023-24 AP Precalculus Exam. Required for Part B. Required for Part A ...Physics c in general is not a popular class with most districts having one class and sometimes barely being able to fill it. For e&m, I think last year or whatever recorded year on google less than 20k people took it. Existing_Ladder_8681 9: Calc BC, APUSH, Phys E&M, HuG (All 5) • 5 mo. ago.Advanced Placement (AP) Physics C: Mechanics (also known as AP Mechanics) is an introductory physics course administered by the College Board as part of its Advanced Placement program. It is intended to proxy a one-semester calculus-based university course in mechanics.The content of Physics C: Mechanics overlaps with that of AP Physics …ADVANCED PLACEMENT PHYSICS C TABLE OF INFORMATION CONSTANTS AND CONVERSION FACTORS Proton mass, 1.67 10 kg 27 m p Neutron mass, 1.67 10 kg 27 m n Electron mass, 9.11 10 kg 31 m e Avogadro’s number, 23 1 N 0 6.02 10 mol Universal gas constant, R 8.31 J (mol K) < Boltzmann’s constant, 1.38 10 J K 23 k B Electron charge magnitude, e 1.60 10 C ... Guide to the AP Physics C Exam. The AP Physics C Exams are college-level exams administered every year in May upon the completion of an Advanced Placement Physics C course taken at your high school. There are two different exams offered, AP Physics C: Mechanics and AP Physics C: Electricity and Magnetism. You can take one or both of these exams. Prior to testing day, determine which exams students are taking. ose taking both Physics C exams and those taking Physics C: Mechanics only should report for the 12 noon start time (11 a. in Alaska). ose taking Electricity and Magnetism only should report to the testing room a er the break (approximately 2 p., 1 p. in Alaska). Physics c mechanics frq 2023, Physics C: Mechanics. Four-function, scientific, or graphing calculator. Allowed. Allowed. Physics C: Electricity & Magnetism. Four-function, scientific, or graphing calculator. Allowed. Allowed. Precalculus. Graphing Calculator. See the complete calculator policy for the new 2023-24 AP Precalculus Exam. Required for Part B. Required for Part A ... , B.S. in Physics & Mathematics, Purdue University - West Lafayette (Graduated 2023) ... Once you have finished this process, start tackling physics 1 FRQ from 2014 ..., May 9, 2023 · Study Guides by Unit. 🚗 Unit 1 – Kinematics. 🚀 Unit 2 – Newton’s Laws of Motion. 🎢 Unit 3 – Work, Energy, & Power. 🎳 Unit 4 – Systems of Particles & Linear Momentum. 🚲 Unit 5 – Rotation. 🌊 Unit 6 – Oscillations. , c. Derive an expression for the final angular speed 𝜔 of the hoop-rods system. Express your answer in terms of , , 𝐹, ∆𝑡, and physical constants, as, ... Mechanics and AP Physics C: Electricity and Magnetism Exams, including both the multiple-choice and free-response sections. Scientific or graphing ..., May 9, 2023 · Study Guides by Unit. 🚗 Unit 1 – Kinematics. 🚀 Unit 2 – Newton’s Laws of Motion. 🎢 Unit 3 – Work, Energy, & Power. 🎳 Unit 4 – Systems of Particles & Linear Momentum. 🚲 Unit 5 – Rotation. 🌊 Unit 6 – Oscillations. 🪐 Unit 7 – Gravitation. , This is the regularly scheduled date for the AP Physics C: Mechanics Exam. Your school's AP coordinator can tell you where your exam will be administered. Resources. Article. AP Exams Overview . Get an overview of AP Exams, including exam timing and structure and the best ways to practice., Physics C: Mechanics 2023 Free-Response Questions . Begin your response to . QUESTION 1 . on this page. ... Physics C: Mechanics 2023 Free-Response Questions ,. = AP ..., Prior to testing day, determine which exams students are taking. ose taking both Physics C exams and those taking Physics C: Mechanics only should report for the 12 noon start time (11 a. in Alaska). ose taking Electricity and Magnetism only should report to the testing room a er the break (approximately 2 p., 1 p. in Alaska)., ⚙️ AP Physics C: Mechanics. 📌 Exam Date: May 9, 2023. ... Course Overview + Unit 1 Review + FRQ Practice. written by Kristen Adams. AP Mechanics Kinematics Overview. ... AP Physics C: Mechanics Cram Unit 2: Newton’s Laws of Motion (Dynamics) Slides. written by Sam Reich., All right so you're here for the Set, uh, one questions for the AP, Physics, C mechanics, exam of 2023., um, my hope is that like by going through this video of the set one questions, you'll be able to get an idea as to what sort of score., The AP Physics C Mechanics exam is designed to test your understanding of advanced topics in classical mechanics, such as kinematics, dynamics, etc. The multiple-choice section is 45 minutes long and is worth 50% of your overall score; it consists of 35 questions. The free-response section is 1 hour and 30 minutes long and is worth 50% of your ..., The responses were expected to demonstrate the ability to: • Identify properties of a graph related to kinematics. • Use conservation of momentum to solve for the post -collision speed of an object., Free-Response Questions. Download free-response questions from past exams along with scoring guidelines, sample responses from exam takers, and scoring distributions. If you are using assistive technology and need help accessing these PDFs in another format, contact Services for Students with Disabilities at 212-713-8333 or by email at ssd@info ..., PHYSICS C: MECHANICS FREE-RESPONSE QUESTIONS GO ON TO THE NEXT PAGE. -7- Mech.2. A small dart of mass. 0.020 kg is launched at an angle of . 30° above the horizontal with an initial speed of. 10 m/s. At the moment it reaches the highest point in its path and is moving horizontally, it collides with and sticks to a ., Part (b)(ii) earned 3 points. The first point was earned because the graph in the response has the correct shape: the curve increases then decreases in , The 2023 AP exams will take place over a two-week period in May: May 1–5 and May 8–12. The AP Physics C: Mechanics exam for 2023 will be a full-length paper-and-pencil exam that students can take in school only., AP Physics C: Mechanics Cram Units 2 + 5: Uniform Circular Motion (U2), Rotational Kinematics & Rotational Energy Slides written by Sam Reich 🌶️ AP Physics C: Mech Cram Review: Unit 5: Rotational Statics and Dynamics, Angular Momentum, AP Physics C. Each of the following topics has at least a practice test, read the description of each topic to see what will be on it. To access the pdf, click on the green link and the pdf will open in another tab. 1D Motion (Unit 1 Mechanics) Practice Test. Deriving and using kinematic Equations. Position v. Velocity v. Acceleration. Using ..., ... frq-physics-c-mechanics-set-2.pdf; So far, 1 student has earned all 90/90 points on the AP Physics C: Mechanics exam and 1 student has earned all 90/90 ..., A worked out example with a detailed solution of a free response question from the 2018 AP Physics Mechanics exam.Thanks to Physic's teacher, Jacob Bowman, w..., This is a workbook made by MIT that's a compilation of every single AP Physics C Mechanics Test MCQ and FRQ before 2012: ... _c_revision_guide.pdf. Also, I'd recommend doing the FRQs from previous exams on college board's website, just search up Physics C past exam questions FRQs. ... 2023 AP Computer Science Principles Score ..., 96 views 2 weeks ago. This is an attempted solution to the 2023 AP Physics C: Mechanics SET 1. If you want more content or practice, please feel free to visit my TPT store! Enjoy!, AP Physics C: Mechanics 2021 Free-Response Questions: Set 1 Author: ETS Subject: Free-Response Questions from the [Admin Year] AP Physics C: Mechanics Exam Keywords: Physics C: Mechanics; Free-Response Questions; 2021; exam resources; exam information; teaching resources; exam practice; Set 1 Created Date: 1/15/2021 …, In this video I look at a free response question centered mainly around a velocity-dependent drag force!, ⚙️ AP Physics C: Mechanics. 📌 Exam Date: May 9, 2023. ... AP Physics C: Mechanics Cram Unit 4: Systems of Particles and Linear Motion Slides. written by Sam Reich. ... AP Physics C: Mechanics Cram FRQ Tips and Tricks Slides. written by Sam Reich. AP Physics C: Mechanics Finale ., In this video, we’ll unpack a sample free-response question.Download questions here: https://tinyurl.com/49x68epsStay motivated and keep preparing for AP Exa..., Free-Response Questions. Download free-response questions from past exams along with scoring guidelines, sample responses from exam takers, and scoring distributions. If you are using assistive technology and need help accessing these PDFs in another format, contact Services for Students with Disabilities at 212-713-8333 or by email at ssd@info ..., Download free-response questions from past AP Physics C: Mechanics exams, along with scoring guidelines, sample responses, and scoring distributions., 2023 AP Exam Administration Scoring Guidelines; Advanced Placement; exam information; scoring information; exam resources; teacher resources; scoring resources; scoring rubrics; non-ADA, Review of conversions, velocity, acceleration, instantaneous and average velocity and acceleration, uniformly accelerated motion, free fall and free fall graphs, component vectors, vector addition, unit vectors, relative velocity and projectile motion. For the calculus based AP Physics C mechanics exam. Content Times: 0:12 Introductory Concepts., AP Physics C: Mechanics 2022 Free-Response Questions: Set 2 Author: ETS Subject: Free-Response Questions from the 2022 AP Physics C: Mechanics Exam Keywords: Physics C: Mechanics; Free-Response Questions; 2022; exam resources; exam information; teaching resources; exam practice; Set 2 Created Date: 4/2/2022 11:37:08 AM , The 2023 AP Physics C: Mechanics exam will be split equally between two sections: multiple-choice and free-response questions. Each section is worth 50 percent of the exam score. You will have 45 minutes to answer 35 multiple-choice questions and 45 minutes to answer 3 free-response questions.