Question 1

Grandpop gets a flat tire.  He uses a jack to lift up his car.  Why is the jack useful?

Accepted Answer

It lets you use force to lift very heavy objects.

Answer

It helps a tow truck pull your car to a garage.

Answer

It makes your car push things with greater force.

Answer

It teaches you how to be safe when you drive a car.

Question 2

Why does it take more force to throw a baseball than a paper plane?

Accepted Answer

because the baseball is heavier than the paper plane.

Answer

because the baseball is smaller than the paper plane.

Answer

because the baseball is round and the plane is not.

Answer

because the baseball is lighter than the paper plane.

Question 3

Which describes how fast something is moving?

Accepted Answer

speed

Answer

slide

Answer

position

Answer

force

Question 4

Why might you slip often more on an icy road than a dirt road?

Accepted Answer

because there is less friction between an icy road and your feet.

Answer

because an icy road changes position faster than a dirt road.

Answer

because an icy road stops your motion better than a dirt road.

Answer

because you need more force to walk on an icy road.

Question 5

Which statement is FALSE?

Accepted Answer

You do not need force to move light objects.

Answer

The harder you push, the more force you use.

Answer

Friction is a force that can slow things down.

Answer

You can push or pull to put things in motion.

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