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Questions 1, 4, and 5 are short free-response questions that require about 13 minutes each to answer and are worth 7 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.
- 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 ...
Hello all! Your favorite physics enthusiast here. (JK, you probably haven’t heard of me before) I would like to share some of the resources I used to study for the AP Physics 1 exam, as well as some tips, because I see this question asked SO often!
Number of resistors (1 Q each) Req Current Resistances in series Number of resistors (1 Q each) —e— Voltage —0— Power Resistances in parallel 1 .00 0.80 0.60 - 0.20 UJ 0.00 Number of resistors (1 Q each) Current Resistances in parallel 50 40 30 20 10 600 500 400 300 0 200 100 3 o 12 10 150 100 50 12 10 Number of resistors (1 voltage
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The course description from the College Board includes 12 AP Physics 1 multiple choice practice questions along with sample free response questions. Khan Academy The Khan Academy has a huge collection of videos and practice problems to work through.
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. I practiced previous years FRQ's and did fairly well usually getting 3/5 of the total points (skipping the electricity questions) but I flopped entirely when I did the 2021 FRQ..
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framework and AP Physics 1 Exam and serve as examples of the types of questions that appear on the exam. After the sample questions, teachers will find a table that shows which science practice(s), learning objective(s), and unit each question relates to. The table also provides the answers to the multiple-choice questions. Section I: Multiple ...
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