Newton's First Law

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 inertia?

Back

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

Front

What does it mean for forces to be balanced?

Back

Balanced forces are equal in size and opposite in direction, resulting in no change in motion.

Front

What does it mean for forces to be unbalanced?

Back

Unbalanced forces are not equal and can cause an object to start moving, stop moving, or change direction.

Front

How do you calculate net force when two forces act in the same direction?

Back

You add the magnitudes of the two forces together.

Front

How do you calculate net force when two forces act in opposite directions?

Back

You subtract the smaller force from the larger force.

Front

What happens to an object in motion if no unbalanced forces act on it?

Back

It continues to move at a constant velocity.

Front

What is an example of inertia in everyday life?

Back

A passenger lurching forward in a car when it suddenly stops.

Front

Do all objects have inertia?

Back

Yes, all objects with mass have inertia.

Front

What is the relationship between mass and inertia?

Back

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