Newton's Laws of Motion

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

• An object at rest will remain at rest unless acted upon by an unbalanced force.

• The acceleration of an object is directly proportional to the net force acting on it.

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

• The force of gravity acts between all objects in the universe.

A car suddenly stops, and the passengers lurch forward. This is an example of:

• Newton’s First Law

• Newton’s Second Law

• Newton’s Third Law

• Law of Universal Gravitation

Answer explanation

According to Newton’s Second Law of Motion, the acceleration of an object depends on:

• The object’s mass and the net force acting on it.

• The object’s velocity and the net force acting on it.

• The object’s mass and its velocity.

• The object’s speed and the net force acting on it.

If you push a wall with a force of 10 Newtons, the wall pushes back with a force of:

• 5 Newtons

• 10 Newtons

• 15 Newtons

• 20 Newtons

Which of the following scenarios best illustrates Newton’s Third Law of Motion?

• A book resting on a table.

• A rocket launching into space.

• A ball rolling down a hill.

• A car accelerating on a highway.

What is the formula represented by Newton’s Second Law of Motion?

• F = ma

• F = mv

• F = mg

• F = m/a

An object in motion will stay in motion unless acted upon by an unbalanced force. This statement is an example of:

• Newton’s Third Law

• Newton’s Second Law

• Newton’s First Law

• Law of Universal Gravitation

When a swimmer pushes against the water, the water pushes back with an equal and opposite force. This is an example of:

• Law of Universal Gravitation

• Newton’s Third Law

• Newton’s Second Law

• Newton’s First Law

Which of the following is an example of inertia?

• A ball rolling down a hill.

• A car accelerating on a highway.

• A book remaining at rest on a table.

• A rocket launching into space.

The tendency of an object to resist changes in its state of motion is known as:

• Force

• Velocity

• Acceleration

• Inertia