Question 1

Which of the following best describes Newton's First Law of Motion?

Accepted Answer

An object at rest remains at rest, and an object in motion continues in uniform straight-line motion unless acted upon by a net external force.

Question 2

A hockey puck slides on perfectly frictionless ice at a constant velocity. According to Newton's First Law, what will happen to the puck if no forces act on it?

Accepted Answer

It will continue moving at a constant velocity indefinitely.

Question 3

Which equation correctly represents Newton's Second Law of Motion?

Accepted Answer

$$\sum F = ma$$

Question 4

A car of mass $$1000\ \mathrm{kg}$$ accelerates at $$2\ \mathrm{m/s^2$}. $$What is the net force acting on the car?

Accepted Answer

$$2000\ \mathrm{N}$$

Question 5

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

Accepted Answer

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

Question 6

A person pushes against a wall with a force of $$50\ \mathrm{N}. $$According to Newton's Third Law, what is the force exerted by the wall on the person?

Accepted Answer

$$50\ \mathrm{N} in $$the opposite direction

Question 7

Which of the following best describes the units of force in the SI system?

Accepted Answer

$$1\ \mathrm{kg \cdot m/s^2$}$$

Question 8

A 5 kg box is pulled across a frictionless surface with a net force of $$20\ \mathrm{N}. $$What is its acceleration?

Accepted Answer

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

Question 9

A rocket expels gas downwards. According to Newton's Third Law, what happens to the rocket?

Accepted Answer

The rocket moves upward with a force equal in magnitude and opposite in direction to the force on the gas.

Question 10

A 10 kg object is at rest on a horizontal surface. What is the net force acting on it?

Accepted Answer

$$0\ \mathrm{N}$$

Question 11

A student throws a ball horizontally. Which law explains why the ball continues moving forward after it leaves the student's hand?

Accepted Answer

Newton's First Law

Question 12

If two ice skaters push off from one another, what can be said about the forces they exert?

Accepted Answer

They exert equal and opposite forces on each other.

Question 13

A 2 kg object is acted on by a net force of $$6\ \mathrm{N}. $$What is its acceleration?

Accepted Answer

$$3\ \mathrm{m/s^2$}$$

Question 14

Which of the following scenarios best illustrates Newton's First Law?

Accepted Answer

A car continues moving at a constant speed on a straight road when the driver takes their foot off the accelerator.

Question 15

A 3 kg object is moving with a constant velocity. What can be said about the net force acting on it?

Accepted Answer

The net force is zero.

Question 16

A person stands on a scale in an elevator accelerating upward. Which law explains why the scale reads a higher value than when at rest?

Accepted Answer

Newton's Second Law

Question 17

Which of the following is NOT a correct implication of Newton's Third Law?

Accepted Answer

A single object can exert a force on itself.

Question 18

A 4 kg object is subject to two forces: $$10\ \mathrm{N} to $$the right and $$6\ \mathrm{N} to $$the left. What is its acceleration?

Accepted Answer

$$1\ \mathrm{m/s^2$} to $$the right

Question 19

Which of the following best describes the relationship between force and acceleration according to Newton's Second Law?

Accepted Answer

Force is directly proportional to acceleration.

Question 20

A 1 kg object is dropped from rest. Neglecting air resistance, what is the net force acting on it as it falls?

Accepted Answer

$$9.8\ \mathrm{N}$$ downward

Newton's Laws and Forces: Chapter 4 Study Notes

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드