Science review

A ______ is a push or pull that can cause an object at rest to move.

• momentum
• force
• weight

An object with ____ forces will not change position.

• balanced
• inbalanced
• jedi

True or False: The Net 
Force acting on  an object is the combination of all individual forces acting on it.

• true
• false

in this picture, the net force is the _____ of the two forces and is greater than 0.

• difference
• sum

in this picture, the net force is the _____ of the two forces.

• difference
• sum

Who expanded the understanding of gravity and its importance in the universe. He defined the law of universal gravitation ?

• Einstein
• Lucier
• Newton

_____is a universal force between objects with mass that exerts on every other mass

• gravity
• force
• weight

______  is special because it occurs when you are dealing with objects that are round, like tires. Rolling friction is actually a special case of static friction. (bowling)

• static friction
• sliding friction
• rolling friction

____ occurs when you are trying to move an object, but the object isn't moving. (pushing a brick wall)

• static friction
• sliding friction
• rolling friction

______ happens when you try to move an object, and it does move. (ice skating)

• static friction
• sliding friction
• rolling friction