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Gravity and Friction Review

Total questions: 39

Worksheet time: 21mins

Name
Class
Date
1.

Force between two surfaces that are sliding is known as

a)

magnetism

b)

friction

c)

electric force

d)

I don't know

2.

On which surface would a ball move slowly?

a)

carpet

b)

marble floor

c)

wooden floor

d)

I don't know

3.

Rough surfaces have

a)

more friction

b)

less friction

c)

same level of friction

d)

I don't know

4.

Which of the following statements is not true?

a)

Friction is useful.

b)

Friction slows things down.

c)

Friction can stop things from moving.

d)

Friction is less on rougher surfaces.

5.
What is gravity?
a)
A force
b)
Energy
c)
A push
d)
All of them
6.
Without gravity we would________. 
a)
Float away
b)
Stay in the ground
c)
Nothing would happen.
d)
I don't know
7.
Which objects have a STRONG force of gravity?
a)
Objects with GREATER mass, like elephants
b)
Objects with LESS mass, like mice
8.
Which has more mass, Earth or the Moon?
a)
Earth
b)
Moon
c)
The same
9.
Which has a STRONGER force of gravity, Earth or the Moon?
a)
Earth
b)
Moon
10.
What is mass?
a)
How much MATTER makes up an object.
b)
How much GRAVITY is pulling an object.
11.

Lilly has a flat piece of paper and a ball of paper. She drops both papers at the same time from the same height. The ball of paper hits the ground first. Which force acts on the flat piece of paper that slows it down?

a)

friction

b)

gravity

c)

inertia

d)

magnetism

12.

A ball is kicked and rolls for a long distance across a field. Which eventually causes the ball to slow and stop?

a)

friction

b)

gravity

c)

motion

d)

position

13.

Which is a force that keeps Earth in orbit around the Sun?

a)

friction

b)

gravity

c)

radiation

d)

magnetism

14.
The force that two surfaces exert on each other as they rub against each other.
a)
gravity
b)
friction
c)
mass
d)
weight
15.
The force that pulls objects towards each other.
a)
gravity
b)
friction
c)
mass
d)
weight
16.
The amount of matter in an object
a)
gravity
b)
friction
c)
mass
d)
weight
17.
The measure of the force of gravity on an object.
a)
gravity
b)
friction
c)
mass
d)
weight
18.
Two factors that affect friction
a)
mass and distance
b)
types of surfaces and how hard they are pushed together
c)
force and distance
d)
mass and direction
19.
Two factors that affect gravity
a)
mass and distance
b)
types of surfaces and how hard they are pushed together
c)
force and distance
d)
mass and direction
20.
When two solid surfaces slide over each other.
a)
sliding friction
b)
rolling friction
c)
fluid friction
d)
static friction
21.
The force that keeps you from moving
a)
sliding friction
b)
rolling friction
c)
fluid friction
d)
static friction
22.
The force that fluids apply to a solid object
a)
sliding friction
b)
rolling friction
c)
fluid friction
d)
static friction
23.
Friction of an object rolling across a surface.
a)
sliding friction
b)
rolling friction
c)
fluid friction
d)
static friction
24.
The force of friction acts in the ___________ direction of the motion
a)
opposite
b)
same
25.

What are the two main types of forces?

a)

contact and subcontact

b)

contact and noncontact

c)

noncontact and subcontact

26.

How is a contact force different than a noncontact force? Select all that apply.

a)

a contact force must be touching

b)

a noncontact force must be touching

c)

a contact force does not touch

d)

a noncontact force does not touch

27.

True or False? Gravity is an example of a noncontact force.

a)

True

b)

False

28.

Rock 1 has a mass of 15 g. Rock 2 has a mass of 45 g. Which rock will experience a greater pull of gravity?

a)

rock 1

b)

rock 2

c)

they will experience the same pull of gravity

29.

You drop a ping pong ball, a tennis ball, and a watermelon off a wall. Which one will land first?

a)

ping pong ball

b)

tennis ball

c)

watermelon

d)

they will all land at the same time

30.

Select all that describe friction.

a)

it is a contact force

b)

it slows objects down

c)

it is a noncontact force

d)

there are 3 main types

31.

Select the 3 main types of friction.

a)

rolling

b)

springy

c)

sliding

d)

fluid

32.

Bowling is an example of what type of friction?

a)

rolling

b)

sliding

c)

fluid

33.

Swimming laps is an example of what type of friction?

a)

rolling

b)

sliding

c)

fluid

34.

Writing down notes is an example of what type of friction?

a)

rolling

b)

sliding

c)

fluid

35.

True or False? Fluid friction only occurs in liquid.

a)

True

b)

False

36.

What type of surface would have the least amount of friction?

a)

gravel

b)

sand

c)

concrete sidewalk

d)

ice

37.

True or False? Fluid friction only occurs in liquid.

a)

True

b)

False

38.

Surfaces with more friction require ________ force to push something over them.

a)

less

b)

the same amount

c)

more

39.

Surfaces with more friction require ________ force to push something over them.

a)

less

b)

the same amount

c)

more

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