Newton's First Law of Motion

Front

What is Newton's First Law of Motion?

Back

An object at rest will remain at rest, and an object in motion will continue in motion at a constant velocity unless acted upon by an unbalanced force.

Front

What does the term 'inertia' refer to?

Back

Inertia is the tendency of an object to resist changes in its state of motion.

Front

What is an example of an unbalanced force?

Back

A person pushing a stationary car to get it moving.

Front

What happens to a moving object when no forces act on it?

Back

It continues to move at a constant speed in a straight line.

Front

What is the relationship between mass and inertia?

Back

The greater the mass of an object, the greater its inertia.

Front

What is a balanced force?

Back

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

Front

How does Newton's First Law apply to seat belts in cars?

Back

Seat belts provide an unbalanced force that keeps passengers from continuing to move forward in a collision.

Front

What is an example of an object at rest?

Back

A book lying on a table.

Front

What is an example of an object in motion?

Back

A soccer ball rolling across the field.

Front

What is the effect of gravity on an object in free fall?

Back

Gravity is an unbalanced force that causes the object to accelerate downward.