Question 1

A car is moving at a constant velocity on a straight road. Which of the following statements is correct about the net force acting on the car?

Accepted Answer

The net force is zero.

Question 2

If a block of mass $$2\ \mathrm{kg} is $$acted upon by two forces: $$3\ \mathrm{N} to $$the left and $$4\ \mathrm{N} to $$the right, what is the acceleration of the block?

Accepted Answer

$$0.5\ \mathrm{m/s^2$} to $$the right

Question 3

Which of the following best describes the direction of the force of friction on a sliding crate?

Accepted Answer

Opposite to the direction of the sliding

Question 4

A rocket's mass decreases as it burns fuel, but the thrust (force) remains constant. What happens to the rocket's acceleration over time?

Accepted Answer

It increases

Question 5

Which of the following quantities depends on gravity?

Accepted Answer

Weight

Question 6

If the speed of a car increases, what happens to the friction force between the road and the tires?

Accepted Answer

It remains constant

Question 7

Newton's second law can be written as $$F = ma. If $$the net force on an object is doubled while its mass remains constant, what happens to its acceleration?

Accepted Answer

It doubles

Question 8

A crate is pushed horizontally across a floor at constant speed. What can you say about the frictional force acting on the crate?

Accepted Answer

It is equal to the applied force

Question 9

Which of the following is true about the mass and weight of an object on the Moon compared to Earth?

Accepted Answer

Mass is the same, weight is less on the Moon

Question 10

A skydiver jumps from a plane and accelerates until reaching terminal speed. What happens to the air resistance as the skydiver's speed increases?

Accepted Answer

It increases

Question 11

If you double the mass of an object while applying the same net force, what happens to its acceleration according to Newton's second law?

Accepted Answer

It is halved

Question 12

A $$1000\ \mathrm{kg}$$ spacecraft is launched from Earth. If Jupiter's gravitational acceleration is $$24.79\ \mathrm{m/s^2$}$$, what is the spacecraft's weight on Jupiter?

Accepted Answer

$$24,790\ \mathrm{N}$$

Question 13

Which of the following is a correct statement of Newton's first law?

Accepted Answer

An object at rest will remain at rest unless acted on by a net force.

Question 14

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

Accepted Answer

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

Question 15

Which of the following best explains why a heavier person experiences greater air resistance at terminal speed than a lighter person?

Accepted Answer

Because the equilibrium rule predicts air resistance equals weight at terminal speed.

Question 16

If two forces of equal magnitude act in opposite directions on an object, what is the net force?

Accepted Answer

Zero

Question 17

Which of the following is NOT a factor that affects the force of air resistance on a falling object?

Accepted Answer

The object's color

Question 18

A block is sliding on a horizontal frictionless surface. If a constant horizontal force is applied, what happens to the block's velocity?

Accepted Answer

It increases linearly with time

Question 19

Which of the following is the correct SI unit for force?

Accepted Answer

Newton

Newton’s Laws of Motion, Friction, and Forces – Study Guide

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