Question 1

What are two factors that affect FRICTION between surfaces?

Accepted Answer

surface type and how hard they are pushed together

Answer

mass and distance

Answer

mass and weight

Question 2

What two factors affect GRAVITY between two objects?

Accepted Answer

mass and distance

Answer

mass and weight

Answer

type of surface and friction

Question 3

What is mass?

Accepted Answer

the amount of matter in an object

Answer

how heavy something is

Answer

how hard gravity pulls an object

Question 4

What is weight?

Accepted Answer

a measure of gravity

Answer

kilograms

Answer

pounds

Question 5

What is friction?

Accepted Answer

the force that surfaces exert on each other when they rub together

Answer

the force that pulls objects toward each other

Answer

a measure of the force of gravity on an object

Question 6

Which of these is an example of rolling friction?

Accepted Answer

a wheel rolling on the ground

Answer

rubbing sandpaper together

Answer

the hinge of a door that is oiled

Question 7

Which of these is an example of sliding friction?

Accepted Answer

rubbing sandpaper together

Answer

a stationary tree

Answer

the measure of gravity on an object

Question 8

Which of these is an example of fluid friction?

Accepted Answer

a fish swimming in a lake

Answer

a fish in a boat

Answer

a fish on the dinner table

Question 9

Which of these is an example of static friction?

Accepted Answer

a sleeping hippo

Answer

a door hinge that has been oiled

Answer

a wheel rolling on a surface

Question 10

What is the law of universal gravitation?

Accepted Answer

a law that states there is gravity between all objects

Answer

a law that states you should understand gravity

Answer

a new law passed by congress

Question 11

What is gravity?

Accepted Answer

the force that pulls objects toward each other

Answer

the moon revolving around the Earth

Answer

a pull that only the Earth has

Question 12

As the DISTANCE INCREASES what happens to the gravitational force?

Accepted Answer

it decreases

Answer

it increases

Answer

it stays the same

Question 13

In which direction does friction act?

Accepted Answer

the opposite direction as the object's motion

Answer

the same direction as the object's motion

Question 14

When the force required to push an object increases what happens?

Accepted Answer

friction increases

Answer

friction decreases

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