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Forces, Friction and Variables Review

Total questions: 40

Worksheet time: 2hrs 30mins

Name
Class
Date
1.
What type of force describes the red arrow?
a)
Gravity Force
b)
Friction Force
c)
Driving Force
d)
Air friction resistance Force
2.
By looking at the picture, what is the best conclusion?
a)
Friction is in the same direction as Motion
b)
The Friction force  is  opposite to the direction of  the motion force
c)
Friction does not count
d)
I forgot my I-pad
3.

When two forces are equal and act in opposite directions we call it...

a)

gravity

b)

friction

c)

balanced force

d)

unbalanced force

4.
Force is measured in....
a)
Galileos 
b)
Newtons
c)
Di Vincis
d)
Einsteins 
5.

In the free-body diagram, which of the following is the gravitational force acting on the balloon?

a)

5120 N

b)

950 N

c)

1520 N

d)

4050 N

6.
Who wins the tug of war with what net force?
a)
The person on the left with 20 N
b)
The person on the left with 80 N
c)
The people on the right with 20 N
d)
The people on the right with 100 N
7.
If these boys are pulling with the same amount of force.  What will happen?
a)
The boy in blue will win.
b)
They will not move at all.
c)
The boy in red will win.
d)
Both will fall down.
8.
Calculate the Net Force. 
a)
60N, Left 
b)
40N, Right 
c)
0N
d)
60N, Right
9.
Balanced or Unbalanced?
a)
Balanced 
b)
Unbalanced
10.
What will cause an object to move?
a)
Applied forces
b)
Balanced forces
c)
Unbalanced forces
11.
The amount of matter in an object is 
a)
pressure
b)
weight
c)
mass
d)
force
12.

What does this tool measure?

a)

temperature

b)

meters

c)

mass

d)

force

13.

The mass is a fixed value, it doesn't change by changing..........

a)

gravity

b)

planet

c)

shape

d)

All the above

14.
What type of force is shown in the picture?
a)
The Cat force
b)
Star Wars Force
c)
Unbalanced force
d)
Balanced  force
15.

How do you know if this object is balanced?

a)

It's not balanced; it's Net Force is 14 N

b)

It is balanced because its Net Force is 0 N.

c)

It's not balanced; it's Net Force is 10 N left and 4 N up.

d)

I don't know how to tell.

16.

What is the net force on this object?

a)

80 N West

b)

80 N East

c)

40 N West

d)

40 N East

17.

What is the net force?

a)

3 N

b)

3 N, right

c)

17 N, right

d)

3 N, left

18.
The sum of all forces acting on an object.
a)
Contact Force
b)
Balanced Force
c)
Unbalanced Force
d)
Net Force
19.
What will cause an object to move?
a)
Applied forces
b)
Balanced forces
c)
Unbalanced forces
20.
When forces are _________ the object DOES NOT move.
a)
unbalanced
b)
balanced
c)
heavy
d)
light
21.
When forces are ___________ the object will move.
a)
unbalanced
b)
balanced
c)
light
d)
gravity
22.
Friction is a force that acts in an ___________ direction of movement.
a)
similar
b)
opposite
c)
parallel
d)
west
23.
How can friction be reduced?
a)
reduce the force acting between the 2 surfaces
b)
reduce the roughness of the 2 surfaces coming in contact
c)
use wax, grease or oil
d)
all of the above are ways of reducing friction
24.
Which of the following is an example of friction that is helpful?
a)
Brakes used on a bike
b)
Tires from a car on the road
c)
Tread on the bottom of your shoes
d)
All are examples that are helpful
25.
Rougher surfaces have ...
a)
greater friction
b)
less friction
c)
the same level of friction
26.
The rougher the surface, the faster an object will travel over the surface.
a)
True
b)
False
27.
When most objects with smooth surfaces rub, there is less friction.
a)
True
b)
False
28.
What does friction produce?
a)
light
b)
sound
c)
heat
d)
gravity
29.

Weight is

a)

a force caused by gravity

b)

what I see on my bathroom scales

c)

how much matter is in an object

d)

the passing of time

30.

I calculate weight by

a)

mass x gravity

b)

mass x size

c)

mass x height

d)

mass x length

31.

The things that are kept the same to ensure the results are due to the experiment is called..

a)

Control Variable

b)

Constant

c)

Independent Variable

d)

Dependent Variable

32.

The variable the is changed on purpose is..

a)

Constant

b)

Control variable

c)

Independent Variable

d)

Dependent Variable

33.

The variable that is being tested, counted, or measured and is responding to the independent variable is known as

a)

Control variable

b)

Constant

c)

Independent Variable

d)

Dependent Variable

34.

Mrs. Goodwyn wants to see if studying time affects test scores...She gives all 6 classes the same assignment but assigns different study times. What is the controlled variable?

a)

Study Times

b)

Test Scores

c)

Same Assignment

35.
A student wants to test the hypothesis of "If salt is added to water then the boiling point of water will decrease." What is the independent variable?
a)
Amount of salt
b)
Boiling Point
c)
Amount of water
36.
Mrs. Goodwyn wants to see if studying time affects test scores...She gives all 6 classes the same assignment but assigns different study times. What is the dependent variable?
a)
Study  time
b)
Test Score
c)
Same Assignment
37.
Plants grow best in colored light. What is the independent variable of this statement?
a)
Plant Growth
b)
Colored Light
38.
Which brand of paper towel will absorb the most liquid? What is the independent variable?
a)
Brand of paper towel
b)
Amount of water absorbed
39.
Which brand of paper towel will absorb the most liquid? What is the dependent variable?
a)
brand of paper towel
b)
amount of water absorbed
40.
Research as shown to support that if students pay attention in class have higher test scores. What is the independent variable?
a)
research
b)
 paying attention 
c)
test scores

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