The Laws of Motion Exam Review

Front

What will happen to an object at rest if the net force acting on it is zero?

Back

It will stay at rest.

Front

If a force causes an object to start moving, stop moving, or change direction, it's considered a(an) __________ force.

Back

Unbalanced.

Front

Which example describes a contact force?

Back

A baseball being hit by a baseball bat.

Front

Is this a balanced or unbalanced force?

Back

Unbalanced.

Front

An airplane is travelling at a constant speed of 540 mph. Explain the forces at work on the plane.

Back

Balanced, because the speed is constant and there is no change in direction.

Front

What is Newton's First Law of Motion?

Back

An object at rest stays at rest, and an object in motion stays in motion unless acted upon by a net external force.

Front

Define balanced forces.

Back

Forces that are equal in size and opposite in direction, resulting in no change in motion.

Front

Define unbalanced forces.

Back

Forces that are not equal and opposite, causing a change in motion.

Front

What is inertia?

Back

The tendency of an object to resist changes in its state of motion.

Front

Give an example of a situation with balanced forces.

Back

A book resting on a table.