Question 1

A car accelerates uniformly from rest to a velocity of $$20\ \mathrm{m/s} in$$ $$5\ \mathrm{s}. $$What is the magnitude of its acceleration?

Accepted Answer

$$2\ \mathrm{m/s^2$}$$

Question 2

Which of the following best describes the work done by gravity on a ball thrown vertically upward with an initial velocity $$v_0$$?

Accepted Answer

Negative, because the force of gravity acts opposite to the displacement.

Question 3

A $$2\ \mathrm{kg}$$ object is moving at $$3\ \mathrm{m/s}. $$What is its kinetic energy?

Accepted Answer

$$18\ \mathrm{J}$$

Question 4

A block slides down a frictionless incline of height $$h. $$What is its speed at the bottom?

Accepted Answer

$$\sqrt{2gh}$$

Question 5

Which of the following statements about Newton's Third Law is correct?

Accepted Answer

For every action, there is an equal and opposite reaction.

Question 6

A $$5\ \mathrm{kg}$$ mass is attached to a string and swung in a horizontal circle of radius $$2\ \mathrm{m} at a $$constant speed of $$4\ \mathrm{m/s}. $$What is the tension in the string?

Accepted Answer

$$40\ \mathrm{N}$$

Question 7

A projectile is launched at an angle $$	heta$$ with initial speed $$v_0. $$What is the time of flight?

Accepted Answer

$$\dfrac{2v_0 \sin	heta}{g}$$

Question 8

A $$10\ \mathrm{kg}$$ box is pulled across a horizontal surface with a force of $$50\ \mathrm{N} at an $$angle of $$30^\circ$$ above the horizontal. If the coefficient of kinetic friction is $$0.2$$, what is the acceleration of the box?

Accepted Answer

$$2.1\ \mathrm{m/s^2$}$$

Question 9

Which of the following best explains why astronauts in the International Space Station appear weightless?

Accepted Answer

They are in continuous free fall around the Earth.

Question 10

A $$0.5\ \mathrm{kg}$$ ball moving at $$4\ \mathrm{m/s}$$ collides elastically with a stationary $$0.5\ \mathrm{kg}$$ ball. What is the velocity of the first ball after the collision?

Accepted Answer

$$0\ \mathrm{m/s}$$

Question 11

A $$3\ \mathrm{kg}$$ object is acted on by a net force of $$12\ \mathrm{N}. $$What is its acceleration?

Accepted Answer

$$4\ \mathrm{m/s^2$}$$

Question 12

A $$2\ \mathrm{kg}$$ mass is attached to a spring with spring constant $$k = 50\ \mathrm{N/m}. $$What is the period of oscillation?

Accepted Answer

$$1.26\ \mathrm{s}$$

Question 13

A $$1\ \mathrm{kg}$$ ball is dropped from a height of $$5\ \mathrm{m}. $$What is its speed just before hitting the ground? (Neglect air resistance.)

Accepted Answer

$$10\ \mathrm{m/s}$$

Question 14

A $$0.2\ \mathrm{kg}$$ ball is attached to a string and swung in a vertical circle of radius $$1\ \mathrm{m}. $$What is the minimum speed at the top of the circle to keep the string taut?

Accepted Answer

$$2.0\ \mathrm{m/s}$$

Question 15

A $$0.5\ \mathrm{kg}$$ cart moving at $$2\ \mathrm{m/s}$$ collides and sticks to a $$1.5\ \mathrm{kg}$$ cart at rest. What is their final velocity?

Accepted Answer

$$0.5\ \mathrm{m/s}$$

Question 16

A $$10\ \mathrm{kg}$$ object is lifted at constant speed to a height of $$2\ \mathrm{m}. $$How much work is done by the lifting force?

Accepted Answer

$$196\ \mathrm{J}$$

Question 17

A $$0.1\ \mathrm{kg}$$ ball is attached to a $$0.5\ \mathrm{m}$$ string and swung in a horizontal circle at $$2\ \mathrm{m/s}. $$What is the centripetal force?

Accepted Answer

$$0.8\ \mathrm{N}$$

Question 18

A $$2\ \mathrm{kg}$$ block slides $$4\ \mathrm{m}$$ down a frictionless incline making an angle of $$30^\circ$$ with the horizontal. What is the work done by gravity?

Accepted Answer

$$39.2\ \mathrm{J}$$

Question 19

A $$0.5\ \mathrm{kg}$$ mass attached to a spring oscillates with amplitude $$0.1\ \mathrm{m}$$ and period $$1\ \mathrm{s}. $$What is the maximum speed?

Accepted Answer

$$0.63\ \mathrm{m/s}$$

Question 20

A $$1\ \mathrm{kg}$$ object moves in a circle of radius $$2\ \mathrm{m} at a $$constant speed of $$3\ \mathrm{m/s}. $$What is its angular momentum?

Accepted Answer

$$6\ \mathrm{kg\cdot m^2$/s}$$

AP Physics 1 Syllabus and Study Guide

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드