# Chapter 9 Forces and Motion. If you add force to an open door it _________________.

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Chapter 9 Forces and Motion

If you add force to an open door it _________________.

Moves

The _____________ of an object is its position.

Location

When an object rubs against another object it creates _______________.

Friction

When an object changes __________ it is in motion.

Position

The pull of ________ on an object is that object’s weight.

Gravity

Scientists measure _________ in newtons.

Weight

The __________ between two places is called distance.

Length

A __________ measures weight in the English system.

Pound

A cheetah can run at a greater __________ than a person can.

Speed

Things fall to Earth because of ______________.

Gravity

It would be hard to skate on a gravel road because the gravel increases ___________.

Friction

To measure speed you need to measure _______ and _______.

Time and Distance

The force of _________ can slow things down.

Friction

If you can run 6 miles in an hour how far can you run in one and one half hours?

9 miles

On what planet would you weigh the least?

Pluto

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