What pulls a ball back to earth?

_______ is a force that acts between two objects which are touching. This force slows any movement between the two objects.

the amount of material in a substance

What surface would probably offer the least friction if you were to slide a box across it?

The rougher the surface, the faster an object will travel over the surface.

1. It is easier to ride a bicycle down a hill than to ride up a hill because _______ helps the bicycle move down the hill.

the tendency of an object to resist a change in its motion

Objects with greater _________ also have greater inertia.

An object following a straight-line path at a constant speed

When are you undergoing an acceleration in a car?

If an object has a large mass, it needs a stronger force to make it accelerate. Which law of motion does this describe?

Pushing a child on a swing is easier than pushing an adult on the same swing would be an example of which law of motion?

Identify the law of motion which states that forces always act in equal and opposite pairs.

Which law of motion does this picture illustrate?

What will cause an object at rest to no longer be at rest?

Which one of Newton's Laws says that for every action, there is an equal and opposite reaction?