Question 1

According to Aristotle, which of the following best describes 'natural motion'?

Accepted Answer

Motion that occurs without any external cause, such as a rock falling to the ground.

Question 2

Which of the following statements best reflects Galileo's concept of inertia?

Accepted Answer

An object in motion will remain in motion at constant velocity unless acted upon by a net force.

Question 3

Newton's First Law states that if the net force acting on an object is zero, the object will:

Accepted Answer

Move in a straight line at constant speed or remain at rest.

Question 4

A 200-N girl stands on a weighing scale. What is the reading on the scale?

Accepted Answer

$$200\ \mathrm{N}$$

Question 5

If a ball is rolling down an incline and onto a horizontal surface, what will happen to its speed (ignoring friction)?

Accepted Answer

It will continue at a constant speed.

Question 6

Which of the following best describes the equilibrium rule in symbolic notation?

Accepted Answer

$$\Sigma F = 0$$

Question 7

A crate is sliding at an unchanging speed when pushed with a steady force of $$75\ \mathrm{N}. $$What is the net force acting on the crate?

Accepted Answer

$$0\ \mathrm{N}$$

Question 8

If you are standing in a moving bus that suddenly stops, what happens to your body?

Accepted Answer

You lurch forward due to inertia.

Question 9

Which of the following is an example of dynamic equilibrium?

Accepted Answer

A car moving at constant velocity on a straight road.

Question 10

When you pull horizontally on a box with a force of $$100\ \mathrm{N} to $$the right and there is a $$30\ \mathrm{N}$$ force to the left, what is the net force?

Accepted Answer

$$70\ \mathrm{N} to $$the right

Question 11

Which of the following best describes mechanical equilibrium?

Accepted Answer

The net force acting on the object is zero.

Question 12

If you toss a coin upward while riding a smooth train, where does the coin land?

Accepted Answer

In your hand.

Question 13

Which of the following is NOT a correct statement of Newton's First Law?

Accepted Answer

An object will accelerate if the net force is zero.

Question 14

If you are holding a ball at rest in your hand, what is the net force acting on the ball?

Accepted Answer

$$0\ \mathrm{N}$$

Question 15

Which of the following best explains why a tablecloth can be pulled quickly from under dishes without moving them much?

Accepted Answer

The inertia of the dishes resists the change in motion.

Question 16

A car is traveling at $$30\ \mathrm{km/h}$$ relative to the ground. If the car moves at $$100\ \mathrm{km/h}$$ relative to the Sun, what is its speed relative to the ground?

Accepted Answer

$$30\ \mathrm{km/h}$$

Question 17

Which of the following is a real-world example of Newton's First Law?

Accepted Answer

A hockey puck sliding on ice continues moving until friction slows it down.

Question 18

If the sum of all forces acting on an object is not zero, what will happen to the object?

Accepted Answer

It will accelerate.

Question 19

Which of the following best describes the concept of net force?

Accepted Answer

The sum of all forces acting on an object.

Question 20

If you are pushing a box across the floor at constant speed, what can you say about the forces acting on the box?

Accepted Answer

The applied force equals the friction force.

Study Notes: Newton's First Law of Motion (Inertia) and Early Concepts of Motion

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