Front

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

Back

Inertia

Front

Why don't moving objects keep moving forever?

Back

There is almost always an unbalanced force acting on them.

Front

What two variables define force?

Back

Mass and acceleration.

Front

The measure of the amount of matter in an object is...

Back

Mass.

Front

When does a change in motion occur?

Back

When the forces are unbalanced.

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 an unbalanced force.

Front

What is Newton's Second Law of Motion?

Back

The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.

Front

What is Newton's Third Law of Motion?

Back

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

Front

What is the formula for calculating force?

Back

Force = Mass x Acceleration (F = ma).

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force of gravity acting on that mass.