Forces and Motion

Front

What happens when two forces act in the same direction?

Back

Their strengths are added.

Front

If you push on a tree with 20 N of force and it doesn't move, how much force is the tree pushing back on you with?

Back

20 N

Front

Which needs a greater net force to move: a kilogram of feathers or a kilogram of iron?

Back

Same

Front

If Jupiter has about 317 times more mass than Earth, what can you infer about its gravitational force?

Back

Jupiter’s gravitational force is much stronger than Earth’s gravitational force.

Front

What type of force produces a change in motion?

Back

Unbalanced force.

Front

What is the definition of force?

Back

A push or pull on an object.

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

What is the formula for calculating net force?

Back

Net Force = Total Forces Acting on an Object.

Front

What is friction?

Back

A force that opposes motion between two surfaces in contact.

Front

What is gravitational force?

Back

The force of attraction between two masses.