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Cracking The AP Physics 1 Exam

Robert Franek

Chapter 3

Kinematics - all with Video Answers

Educators

Chapter Questions

03:33

Problem 1

An object that’s moving with constant speed travels once around a circular path. Which of the following statements are true concerning this motion? Select two answers.
(A) The displacement is zero.
(B) The average speed is zero.
(C) The acceleration is zero.
(D) The velocity is changing.

Khoobchandra Agrawal
Khoobchandra Agrawal
Numerade Educator
01:16

Problem 2

(Graph is not available to copy)

In section 5 of the velocity-time graph, the object is
(A) speeding up moving in the positive direction
(B) slowing down moving in the positive direction
(C) speeding up moving in the negative direction
(D) slowing down moving in the negative direction

Khoobchandra Agrawal
Khoobchandra Agrawal
Numerade Educator
07:50

Problem 3

Which of the following statements are true about uniformly accelerated motion? Select two answers.
(A) If an object’s acceleration is constant, then it must move in a straight line.
(B) If an object’s acceleration is zero, then it’s speed must remain constant.
(C) If an object’s speed remains constant, then its acceleration must be zero.
(D) If the object’s direction of motion is changing, then its acceleration is not zero.

Khoobchandra Agrawal
Khoobchandra Agrawal
Numerade Educator
02:02

Problem 4

A baseball is thrown straight upward. What is the ball’s acceleration at its highest point?
(A) $\frac{1}{2} g,$ downward
(B) $g,$ downward
(C) $\frac{1}{2} g,$ upward
(D) $g,$ upward

Khoobchandra Agrawal
Khoobchandra Agrawal
Numerade Educator
00:56

Problem 5

How long would it take a car, starting from rest and accelerating uniformly in a straight line at $5 \mathrm{m} / \mathrm{s}^{2},$ to cover a distance of 200 m ?
(A) 9.0 s
(B) 10.5 s
(C) 12.0 s
(D) 15.5 s

Narayan Hari
Narayan Hari
Numerade Educator
03:35

Problem 6

A rock is dropped off a cliff and strikes the ground with an impact velocity of 30 m/s. How high was the cliff?
(A) 20 m
(B) 30 m
(C) 45 m
(D) 60 m

Tausaga Pauu
Tausaga Pauu
Numerade Educator
04:03

Problem 7

A stone is thrown horizontally with an initial speed of 10 m/s from a bridge. Assuming that air resistance is negligible, how long would it take the stone to strike the water 80 m below the bridge?
(A) 1 s
(B) 2 s
(C) 4 s
(D) 8 s

Meghan Miholics
Meghan Miholics
Numerade Educator
01:22

Problem 8

A soccer ball, at rest on the ground, is kicked with an initial velocity of 10 m/s at a launch angle of 30°. Calculate its total flight time, assuming that air resistance is negligible.
(A) 0.5 s
(B) 1 s
(C) 2 s
(D) 4 s

Khoobchandra Agrawal
Khoobchandra Agrawal
Numerade Educator
03:44

Problem 9

A stone is thrown horizontally with an initial speed of 30 m/s from a bridge. Find the stone’s total speed when it enters the water 4 seconds later, assuming that air resistance is negligible.
(A) 30 m/s
(B) 40 m/s
(C) 50 m/s
(D) 60 m/s

Khoobchandra Agrawal
Khoobchandra Agrawal
Numerade Educator
08:13

Problem 10

Which one of the following statements is true concerning the motion of an ideal projectile launched at an angle of 45° to the horizontal?
(A) The acceleration vector points opposite to the velocity vector on the way up and in the same direction as the velocity vector on the way down.
(B) The speed at the top of the trajectory is zero.
(C) The object’s total speed remains constant during the entire flight.
(D) The vertical speed decreases on the way up and increases on the way down.

Khoobchandra Agrawal
Khoobchandra Agrawal
Numerade Educator
04:27

Problem 11

A stone is thrown vertically upwards with an initial speed of 5 m/s. What is the velocity of the stone 3 seconds later?
(A) 25 m/s, upward
(B) 25 m/s, downward
(C) 35 m/s, upward
(D) 35 m/s, downward

Khoobchandra Agrawal
Khoobchandra Agrawal
Numerade Educator
04:07

Problem 12

A car travelling at a speed of $v_{\mathrm{o}}$ applies its brakes, skidding to a stop over a distance of x m. Assuming that the deceleration due to the brakes is constant, what would be the skidding distance of the same car if it were traveling with twice the initial speed?
(A) 2x m
(B) 3x m
(C) 4x m
(D) 8x m

Meghan Miholics
Meghan Miholics
Numerade Educator