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Download free-response questions from past AP Physics 1 exams, along with scoring guidelines, sample responses from exam takers, and scoring distributions.
- The Exam
Teachers: Explore timing and format for the AP Physics 1:...
- The Exam
Jul 14, 2023 · 2021 AP Free Response Solutions Updated: Jul 14, 2023 If you're looking for help in AP Physics 1, check out a new course I've put together here I'm going to put together my own solutions for the 2021 AP Physics 1, AP Physics 2, AP Physics C, AP Calculus AB, AP Calculus BC, and AP Statistics Free Response questions here, after the questions are ...
I was looking at previous years free responses and I've noticed that the one in 2021 was way harder than the ones prior. For example, the answer for question 1 part A on the 2021 free response requires an extremely complicated solution while the ones in the previous years were easy.
May 8, 2021 · 2021 AP Physics 1 exam - solutions Ah, it's good to be able to download the questions 48 hours after the exam again. It's good to be back to five total questions, two long and three short.
- Question 1
- Question 2
- Question 3
- Question 4
- Question 5
- Question 6
- Question 7
- Question 8
- Question 9
- Question 10
Answer: A First, we’ll need to rely on Newton’s Third Law of Motion. This law states that two bodies exert forces of equal magnitude and opposite direction on each other. In this case, the force that block Y exerts on block X has magnitude Fdown, and the force that block X exerts on block Y has magnitude Fup. By Newton’s Third Law, these forces sho...
Answer: B We can first analyze the potential energy of the block-Earth system at points A and C. We have the following formula: In this equation, Ug is the change in gravitational potential energy, m is the mass, g is the gravitational constant (9.8m/s2), and Δyis the change in height. So, the gravitational potential energy at point A is: UA=mgh. A...
Answer: C To answer this question, we can once again analyze the energy at both points. Since friction is negligible, we know that the total energy at both points is conserved, and therefore equal. So, the total energy at the beginning of the track consists only of gravitational potential energy. The total energy at the end of the track consists of...
Answer: B For this question, we’ll need to rely on the following formula: In this equation, Δp is the momentum, F is the force, and Δtis the change in time. So, if we compute the area under the curve for each object, we’ll be able to determine the change in momentum for each. Since the areas under both curves have the shape of a triangle, we can si...
Answer: D We’ll first need to recall the equation for work: Note that the force which contributes to work (W) is the force (F) that acts parallelto the direction (d) of motion. In this case, since the force is exerted upwards, we have that the work done by the person is positive if the motion is upwards and negative if the motion is downwards. So, ...
Answer: A This problem is tricky in that we’ll need to work with equations involving unknowns since we’re not really given many concrete numbers. So, our strategy will be to analyze the equations in terms of the unknowns in order to compare them. Let’s first look at the relevant equations for gravitational force and circular motion: In this equatio...
Answer: B This question wants us to analyze the momentum of the two carts. Because momentum is conserved, we can analyze the momentum before and after the collision and set it equal to each other. The given equation for momentum is as follows: In this equation, p is the momentum, m is the mass, and vis the velocity. Before the collision, because on...
Answer: A When discussing angular momentum, we should recall that angular momentum is always conserved. So, the total angular momentum before and after the collision should be the same. This means that the correct answer choice is either A or B. Also, let’s use this fact to set up equations in order to learn more about the system. The equations tha...
Answer: B, D This question is one of the infamous multiple-select questions, so you’ll need to be extra careful when selecting your answers. Let’s go through each answer choice and determine whether it’s true or not. For answer choice A, we’ll need to note that the satellite’s rotational kinetic energy is dependent on the radius. But, since the orb...
Solution: Student 1 claims that the sphere can’t move in a circle because none of the forces acting on it are in the direction of point C. But, what the student is forgetting is that the centripetal force is a net force, which means it’s the accumulation of all forces acting on the object. So, even though none of the individual forces are pointing ...
AP® Physics 1 2021 Scoring Guidelines Question 1: Short Answer 7 points (a) For using conservation of energy to find the speed v of the bicycle as it leaves the ramp 1 point For using kinematics, vertical components, attempting to find the time the bicycle is in the air 1 point For a correct expression for X
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Teachers: Explore timing and format for the AP Physics 1: Algebra-Based Exam. Review sample questions, scoring guidelines, and sample student responses.
