Gravity, Newton's First and Second Law Review

Front

What two things determine the gravity of an object?

Back

Mass and distance.

Front

What does Newton’s First Law state?

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

What is the law of inertia?

Back

The law of inertia (Newton’s First Law) applies to both moving and nonmoving objects.

Front

What is the formula for Newton's Second Law?

Back

F = ma (Force equals mass times acceleration).

Front

What is net force?

Back

The overall force acting on an object when all the individual forces are combined.

Front

If two forces of 15 N are acting in the same direction, what is the net force?

Back

30 N to the right.

Front

Why is the net force zero when two equal forces act in opposite directions?

Back

Because they are both pulling the same amount of force in opposite directions.

Front

What happens to an object in motion if no net force acts on it?

Back

It continues to move at a constant velocity.

Front

What is weight?

Back

Weight is the force of gravity acting on an object's mass.

Front

How does distance affect gravitational force?

Back

Gravitational force decreases as the distance between two objects increases.