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AP Physics Conceptual Questions

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Section 1

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Two students release a red ball and a blue ball from the top of the school roof at the same time. The red ball is the heavier of the two. The red ball is simply dropped from rest, the blue ball is thrown downward with some initial velocity. Which of these statements is true? a. the blue ball reaches the ground first b. the red ball reaches the ground first c. they reach the ground at the same time d. none of the statements above are true

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Mar 1, 2020

Cards (18)

Section 1

(18 cards)

Two students release a red ball and a blue ball from the top of the school roof at the same time. The red ball is the heavier of the two. The red ball is simply dropped from rest, the blue ball is thrown downward with some initial velocity. Which of these statements is true? a. the blue ball reaches the ground first b. the red ball reaches the ground first c. they reach the ground at the same time d. none of the statements above are true

Front

a. the blue ball reaches the ground first

Back

A vector has x and y components that are the same sign. The vector must point to which quadrant? a. the 1st b. the 2nd c. the 3rd d. either 1st or 3rd e. either 2nd or 4th

Front

d. either 1st or 3rd

Back

A moving freight car runs into an identical car at rest on the track. The cars couple together. Compared to the velocity of the first car before the collision, the velocity of the combined cars after the collision is a. twice as large b. the same c. one half as large d. zero

Front

c. one half as large

Back

what is the momentum change of an .8 kg tennis ball that hits a wall at .55 m/s, and bounce back at .45 m/s. a) .8 kg m/s b) 8 kg m/s c) 16 kg m/s d) -17 kg m/s

Front

a) .8 kg m/s

Back

In the case of circular motion which pair are not perpendicular? a. tangential velocity and radius b. radius and centripetal acceleration c. centripetal acceleration and tangential velocity d. tangential acceleration and centripetal acceleration

Front

b. radius and centripetal acceleration

Back

A race car is traveling at a constant speed around a circular track. What would the centripetal acc. be for the same car, going the same speed around the track? a. the centripetal acc. remains the same b. the centripetal acc. increases by a factor of 2 c. the centripetal acc. increases by a factor of 4 d. the centripetal acc. is decreased by factor of 2 e. the centripetal acc. is decreased by factor of 4

Front

d. the centripetal acc. is decreased by factor of 2

Back

Which had more momentum, a large truck moving at 30 mph or a small truck moving at 30 mph? A. The small truck B. The large truck C. Both have the same momentum

Front

B. the large truck

Back

When comparing the momentum of two moving objects, which of the following is correct? a. The object with the higher velocity will have less momentum if the masses are equal. b. The more massive object will have less momentum if its velocity is greater. c. The less massive object will have less momentum if the velocities are the same. d. The more massive object will have less momentum if the velocities are the same.

Front

c. The less massive object will have less momentum if the velocities are the same.

Back

If the momentum of an object changes and its mass remains constant A. it is accelerating (or decelerating) B. there is a force acting on it. C. its velocity is changing D. All of the above

Front

D. All of the above

Back

Complete the following statement: A body has no net torque on it... a. only if at rest b. only if moving with constant velocity c. only if moving with constant acc. d. if it is either rotating/ moving with constant angular velocity e. if it is either rotating/ moving with constant velocity or constant acc.

Front

d. if it is either rotating/ moving with constant angular velocity

Back

A piece of chalk is dropped by a teacher walking at a speed of 1.5 m/s. From the teacher's perspective, the chalk appears to fall a. straight down b. down and forwards c. down and backwards d. straight backwards

Front

a. straight down

Back

which of the following units is based on a specific, man-made object? a) meter b) second c) hour d) centimeter e) kilogram

Front

e) kilogram

Back

A puck sliding on a frictionless table undergoes a change in momentum due to a constant force. Which of the following expressions could be used to determine the change in momentum? a. F x ∆d b. F x t c. F x ∆v d. F x (∆v /∆t)

Front

b. F x t

Back

A baseball is hurled at an angle other than 0 or 90 degrees. a. the acc. is zero m/s^2 at all times b. the acc. is 9.8 m/s^2 pointing downwards, at all times c. the acc. is 0 m/s^2 when the football has reached the highest point in its trajectory d. the acc. is positive as the football rises, and it is negative as the football falls e. the acc. starts starts at 9.8 m/s^2 and drops to some constant lower value as the ball approaches the ground

Front

b. the acc. is 9.8 m/s^2 pointing downwards, at all times

Back

Which one of the following is the longest length? a) 10^0 meters b) 10 centimeters c) 10^-4 meters d) 10^-1 meters e) 1 centimeter

Front

b) 10 centimeters

Back

A solid aluminum ball and a hollow aluminum ball of the same external radius are released from rest in a large vacuum chamber. When each has fallen 1 m, they both have the same a. inertia b. speed c. momentum d. weight

Front

b. speed

Back

A pilot drops a package from a plane flying horizontally at a constant speed. Neglecting air resistance, when the package hits the ground the horizontal location of the plane will a. be behind the package b. be over the package c. be in front of the package d. depend on the speed of the plane when the package was released

Front

b. be over the package

Back

A small car has a head-on collision with a large truck. Which of the following statements concerning the magnitude of the avg. force due to collisions is correct? a. the truck experiences the greater sized force b. the small car experiences the greater sized force c. the small car and the truck experience the same sized force d. It is impossible to tell since the masses are not given e. It is impossible to tell since the velocities are not given

Front

c. the small car and the truck experience the same sized force

Back