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STEM Unit 3 Practice Test (L1-4)

Total questions: 155

Worksheet time: 39hrs 45mins

Name
Class
Date
1.

According to Newton’s second law of motion, if force remains the same but mass increases, then acceleration will

a)

increase

b)

decreases

c)

remain constant

2.

An evil ewok threw a rock with a force of 24.6N and an acceleration of 6m/s2 at an innocent stormtrooper. What was the rocks mass?

a)

4Kg

b)

41kg

c)

4.1kg

d)

46kg

3.

Your car has a mass of 2500 kg and a force of 5000 N. How fast will it accelerate?

a)

20 m/s2

b)

2 m/s2

c)

0.5 m/s2

d)

120 N

4.

What happens when unbalanced forces act on an object at rest?

a)

the object remains at rest

b)

the object begins moving in an unpredictable direction

c)

the object begins moving in the direction of the net force

d)

the object begins moving opposite to the direction of net force

5.

A 20 kg bike accelerates at 10 m/s2. What was the force?

a)

25 Newtons

b)

20 Newtons

c)

200 Newtons

d)

10 Newtons

6.

Jenny applies a 60 N force to a 20 Kg cart, what is the acceleration of the cart if friction can be neglected?

a)

1200 m/s/s

b)

0.33 m/s/s

c)

20 m/s/s

d)

3 m/s/s

7.

The mass of a wagon is 40 kg. The wagon accelerates at 8 m/s2 . What is the force?

a)

38.25 Kg

b)

320N

c)

5N

d)

3.825Kg

8.

You push on a tree with 20 N of force. If the tree doesn't move, the tree is pushing back on you with _____of force.

a)

20N

b)

10N

c)

40N

d)

70N

9.

If an object was accelerating at 10 m/s2, and a force of 10 newtons was required to accelerate it, what was the object's mass?

a)

1kg

b)

10kg

c)

5kg

d)

2kg

10.
If a 10 kilogram object accelerates suddenly at 15 m/s^2, how much force was applied to the object?
a)
150 Newtons
b)
15 Newtons
c)
150 kilograms
d)
100 kilograms
11.
If an object was accelerating at 10 m/s^2, and a force of 10 newtons was required to accelerate it, what was the object's mass?
a)
1 kilogram
b)
10 kilograms
c)
2 kilograms
d)
5 kilograms
12.

A cannonball with a mass of 0.5 kg is flying at an acceleration of 10 m/sec/sec. What is its force?

a)

50 Newtons

b)

5 Newtons

c)

20 Newtons

d)

9.5 Newtons

13.
A 260.5N unbalanced force applied to push a chair across the room causing an acceleration of 4.2 m/s2. What is the mass of the chair?
a)
62.02 kg
b)
63.69 kg
c)
263.3 kg
d)
1123.5 kg
14.

which box has more acceleration?

a)

top

b)

bottom

15.

which box has more acceleration?

a)

top

b)

bottom

16.

what happens to the acceleration when the force on an object is doubled?

a)

acceleration also doubles

b)

acceleration becomes half

c)

no change in the acceleration

d)

acceleration becomes zero

17.

use the triangle to solve the question.

Find the acceleration of a box having mass 10Kg when a force of 20N is applied on it.

a)

1m/s2

b)

2m/s2

c)

10m/s2

d)

5m/s2

18.

use the triangle to solve the question.

Find the force required to move a box having mass 10Kg with an acceleration of 9m/s2 .

a)

10N

b)

90N

c)

100N

d)

20N

19.

find the acceleration of the box.

a)

12m/s2 towards right

b)

12m/s2 towards left

c)

40m/s2

d)

60m/s

20.
A net force of 15 N is exerted on an encyclopedia to cause it to accelerate at a rate of 5 m/s2. Determine the mass of the encyclopedia?
a)
 m = 3.0 kg
b)
m = 4.0 kg 
c)
m = 3.0 ml 
d)
m = 30.0 g
21.
Determine the accelerations that result when a 12-N net force is applied to a 3-kg object. 
a)
3 m/s
b)
4 ft/s 
c)
13 m/s
d)
4 m/s 
22.

(Use Fnet=ma), A 10 kg bowling ball would require what force to accelerate down an alleyway at a rate of 3 m/s2?

a)

30 N

b)

13 N

c)

3.3 N

d)

0.3 N

23.

(Using Fnet=ma), What net force is required to accelerate a car at a rate of 2 m/s2 if the car has a mass of 3,000 kg?

a)

6,000 N

b)

1,500 N

c)

3,002 N

d)

2,998 N

24.

(Use Fnet=ma). What is the mass of a falling rock if it produces a force of 147 N? (Acceleration due to gravity = 9.8 m/s2)

a)

15 kg

b)

1,440.6 kg

c)

156.8 kg

d)

137.2 kg

25.

(Use Fnet=ma). What is the mass of a truck if it produces a force of 14,000 N while accelerating at a rate of 5 m/s2?

a)

2,800 kg

b)

0.0004 kg

c)

70,000 kg

d)

13,995 kg

26.

(Use Fnet=ma). What is the acceleration of a softball if it has a mass of 0.5 kg and hits the catcher's mitt with a force of 25 N?

a)

0.5 m/s2

b)

50 m/s2

c)

25.5 m/s2

d)

12.5 m/s2

27.

(Use Fnet=ma). Your parents' car has a mass of 2,000 kg. If your car produces a force of 5,000 N, at what rate will it accelerate?

a)

2.5 m/s2

b)

0.4 m/s2

c)

10,000,000 m/s2

d)

3,000 m/s2

28.

(Use Fnet=ma). Use the diagram to determine the net force, assume the object is accelerating at a rate of 2 m/s2 and determine the mass of the object.

a)

2 kg

b)

4 kg

c)

6 kg

d)

8 kg

29.
How much force is needed to accelerate a 3kg skateboard at 5m/s2?
a)
8N
b)
1.6N
c)
0.6N
d)
15N
30.

For this question, refer to the image to the left...

The larger the ___________ of an object, the greater the ____________ needed to change the direction or the speed.

a)

mass / tow truck

b)

suitcases / force

c)

mass / force

d)

windows / force

31.

If the man pushes with an equal amount of force, which object will accelerate more?

a)

Car because it has more mass

b)

Lawnmower because it has less mass

c)

Car because it has less mass

d)

Lawnmower because it has more mass

32.
The larger the mass you have the _____ force you need to change its motion.
a)
more
b)
less
33.
Which shopping cart will have more acceleration?  
a)
The empty shopping cart
b)
The shopping cart that's full
c)
They will be the same
34.

If a force of 26 N is exerted on two balls, one with a mass of 0.52 kg and the other with a mass of 0.78 kg, which ball will have the greater acceleration? (F=ma)

a)

The one with a mass of .78 kg will have the greatest acceleration.

b)

The one with a mass of .52 kg will have the greatest acceleration.

c)

They will both accelerate at the same rate.

35.
The masses of four objects are given in this table. If all objects are struck with the same amount of force, which one will have the greatest acceleration?
a)
Object 1
b)
Object 2
c)
Object 3
d)
Object 4
36.
Accelerations are produced by
a)
velocities
b)
accelerations
c)
forces
d)
masses
37.
How much force is needed to accelerate a 2 kg physics book to an acceleration of 6 m/s/s?
a)
36 N
b)
12 N
c)
3 N
d)
0.33 N
38.

As more unbalanced force is applied to an object, its acceleration:

a)

stays the same

b)

decreases

c)

increases

39.

Which object would require more force to accelerate?

a)

1

b)

2

c)

They would both required the same force

40.

Which object would require less force to accelerate?

a)

1

b)

2

c)

They would both required the same force

41.

Which object would require less force to accelerate?

a)

Top

b)

Bottom

c)

They would both required the same force

42.

Which object would require more force to accelerate?

a)

Top

b)

Bottom

c)

They would both required the same force

43.

Assuming the same force (5 N), which object would have a larger acceleration?

a)

Top

b)

Bottom

c)

They would both required the same force

44.

Assuming the same force (5 N), which object would have a smaller acceleration?

a)

Top

b)

Bottom

c)

They would both accelerate at the same rate

45.

Assuming the person is pulling with the same force (10 N), which object would have a larger acceleration?

a)

1

b)

2

c)

They would both accelerate at the same rate

46.

Assuming the person is pulling with the same force (10 N), which object would have a smaller acceleration?

a)

1

b)

2

c)

They would both accelerate at the same rate

47.

Which object would have a larger acceleration?

a)

A

b)

B

c)

They would both accelerate at the same rate

48.

Which object would have a smaller acceleration?

a)

A

b)

B

c)

They would both accelerate at the same rate

49.

Calculate the acceleration of Object A.

a)

20 m/s2

b)

4 m/s2

c)

5 m/s2

d)

0 m/s2

50.

Calculate the acceleration for Object B.

a)

10 m/s2

b)

4 m/s2

c)

5 m/s2

d)

0.20 m/s2

51.

TRUE OR FALSE:

Both Object A and Object B would have the same acceleration.

a)

True

b)

False

52.

TRUE OR FALSE:

Both Object A and Object B would have the same acceleration.

a)

True

b)

False

53.

TRUE OR FALSE:

Both Object A and Object B would have the same acceleration.

a)

True

b)

False

54.

TRUE OR FALSE:

Both Object A and Object B would have the same acceleration.

a)

True

b)

False

55.
What is the net force?
a)
65 N left
b)
65 N right
c)
35 N left
d)
35 N right
56.
What is the net force?
a)
5.5 N left
b)
5.5 N right
c)
2.5 N left
d)
2.5 N right
57.
With unbalanced forces, the object will move in the direction of the _______ force.
a)
larger 
b)
smaller 
c)
equal 
58.
Forces that have a net force of zero ( the object is still).
a)
Balanced force
b)
Unbalanced force
59.
Balanced or Unbalanced?
a)
Balanced 
b)
Unbalanced
60.
What is the net force?
a)
1.3 N left
b)
1.3 N right
c)
3.7 N left
d)
3.7 N right
61.
Students are playing tug-of-war. If group B pulls the rope to the right with a force of 400 N and group A pulls the rope to the left with a force of 250 N, what will happen to the ribbon in the middle of the rope?
a)
The ribbon will move to the left and group A will win the tug-of-war.
b)
The ribbon will move to the left and group B will win the tug-of-war.
c)
The ribbon will move to the right and group B will win the tug-of-war.
d)
The ribbon will move to the right and group A will win the tug-of-war.
62.

Student A is pushing at 63 newtons, and student B is pushing at 56 newtons. What is the net force (calculation).

a)

119 N Right

b)

7

c)

7 N Right

d)

119

63.
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.
64.
Is it BALANCED? 
a)
Yes
b)
No
65.
Calculate the net force of the object in the image shown.
a)

20N, Left

b)

35N, left

c)

5N, left

d)

25N, right

66.

What is the net force?

a)

3 N

b)

3 N, right

c)

17 N, right

d)

3 N, left

67.
What is the net force?
a)
20 N 
b)
0 N 
c)
400 N 
d)
40 N 
68.
The sum of all forces acting on an object.
a)
Contact Force
b)
Balanced Force
c)
Unbalanced Force
d)
Net Force
69.

What is the net force being applied to the couch?

a)

5N RIght

b)

5 N Up

c)

45 N Right

d)

25 N Right

70.

What is the NET FORCE? 

a)

5 N

b)

10 N

c)

400 N

d)

0 N

71.
When the vectors (arrows) point in the same direction what function do you use? 
a)
Dividing 
b)
Multiplying 
c)
Subtracting 
d)
Adding 
72.

When the vectors (arrows) point away what function do you use?

a)

Dividing

b)

Multiplying

c)

Subtracting

d)

Adding

73.
If an object is not moving the forces acting upon it are _____________
a)

unbalanced

b)

weak

c)

balanced

74.
What is the net force?
a)
400 N Up
b)
400 N Down
c)
- 400 N Down
d)
800 N Down
75.
How will this object move? 
a)
It won't move. 
b)
It will move to the right. 
c)
It will move to the left. 
d)
It will move up. 
76.

How do you find the net force of this image.

a)

Add up all the arrows

b)

Add a green arrow and the orange arrow.

c)

Subtract all the arrows.

d)

Add the green arrows and subtract the orange arrow.

77.

What is the net force and to what direction.

a)

210 N to the right

b)

280 N to the right

c)

110 N to the left

d)

180 N to the left

78.

What is the Net Force acting on the box in this picture?

a)

30 N to the Right

b)

30 N to the Left

c)

70 N to the Right

d)

70 N to the Left

79.
a)

5 N Left

b)

25 N Right

c)

30 N Left

d)

55 N Right

80.

What is the Net Force and the direction of the object's movement as a result of the net force?

a)

15N, Right

b)

7N, Left

c)

1N, Right

d)

4N, Left

81.

What is the net force on the car?

a)

400 N forward

b)

0 N (balanced forces)

c)

200 N forward

d)

200 N backward

82.

How will this object move?

a)

It will not move

b)

It will move in both directions

c)

It will move to the right

d)

It will move to the left

83.

What is net force?

a)

10 N left

b)

0 N

c)

10 N right

84.
Which of these is evidence that a force has acted on an object?
a)
Change in the object's mass.
b)
A stationary object lying on the ground.
c)
Change in the direction of the object's motion.
d)
The object moving in a straight line at constant velocity.
85.
What is the net force?
a)
5000 N right
b)
4000 N right
c)
40 N left
d)
4000 N left
86.

Calculate the net force shown in the diagram

a)

41 N, down

b)

25 N, down

c)

16 N, up

d)

9 N, down

87.

If both people are exerting a force of 30 N, what is the net force?

a)

30 N, left

b)

60 N, right

c)

30 N, right

d)

0 N

88.

If the boy is pulling with a force of 10 N and the girl is pushing with a force 20 N, what is the net force on the box?

a)

10 N

Right

b)

20 N

RIght

c)

30 N

Right

d)

0 N

89.

What is the net force for this free body diagram?

a)

120 N, up

b)

100 N, down

c)

220 N, up

d)

20 N, up

90.

What is the net force for this free body diagram?

a)

50 N, down

b)

50 N, up

c)

350 N, up

d)

350 N, down

91.

What is the net force for this free body diagram?

a)

300 N

b)

100 N, left

c)

0 N

d)

100 N, right

92.

What is the net force for this free body diagram?

a)

150 N, right

b)

50 N, left

c)

50 N, right

d)

150 N, left

93.
What is the net force?
a)
11 N left
b)
11 N right
c)
3 N left
d)
3 N right
94.
Calculate the Net Force. 
a)
60N, Left 
b)
40N, Right 
c)
0N
d)
60N, Right
95.

When a small car pushes a big truck, the truck applies an equal and opposite force on the car.

a)

False

b)

True

96.

When a cannon fires a cannonball we observe Newton's third law. Which is the reaction force?

a)

The cannon moving forward

b)

The cannon moving backwards

c)

The cannonball moving backwards

d)

The cannonball moving forward

97.

Action reaction forces never cancel each other out because

a)

They act on different objects.

b)

They act on the same objects

c)

They do not act on objects.

98.

If two people with the same mass collide, they experience the same amount of force.

a)

True

b)

False

99.

When the person pushes the ground with their foot, the equal and opposite reaction force is

a)

the ground pushing back on their foot

b)

when they start to move forward

100.

When a heavy football player and a light one run into each other, who exerts more force

a)

The light one

b)

Their force are equal

c)

The heavy one

101.

The forces in a force pair are in _______ direction

a)

opposite

b)

same

102.
A bus hits a bug and the bug splatters on the windshield, which force is greater?
a)
The Bus
b)
The Bug
c)
They're the same
d)
Gravity acting on the bus
103.

A student drops a basketball onto the floor. According to Newton's 3rd law, why does the ball bounce?

a)

The student dropped the ball

b)

The earth pulls the ball down

c)

The ball presses down on the floor

d)

The floor presses up on the ball

104.

If a bug hitting into the windshield of a car is the "action," what is the reaction?

a)

The car experiences an equal strength force from the bug

b)

The bug goes SPLAT

c)

The driver panics and needs to clean the windshield

105.

When you jump, what causes you to move upwards?

a)

You extended your legs gives you momentum upwards

b)

You temporarily stop gravity, causing you to float upwards

c)

You press yourself upwards into the air

d)

The floor presses up on you

106.

What happens when you push on a wall?

a)

Nothing.

b)

The wall pushes back with less force.

c)

The wall pushes back with an equal force.

d)

The wall pushes back with more force.

107.

Action: A swimmer pushes the water backwards

a)

Reaction: The swimmer moves forward

b)

Reaction: The water pushes the swimmer forward

c)

Reaction: The swimmer is tired

d)

Reaction: The water moves backward

108.
When you step on a Lego. You push on the Lego and the Lego pushes back on you.
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
109.

Which of these diagrams correctly shows the amount and direction of the forces on the wall and the car?

a)

A

b)

B

c)

C

d)

D

110.

A golfer hits a golf ball with a club using 70N of force. How much force does the ball put on the bat?

a)

70N

b)

35N

c)

140N

d)

0N

111.

A rock on the ground weighs 40 N. How much force does the ground exert on the rock.

a)

0N

b)

40N

c)

80N

d)

-40N

112.

The bat hits the ball. What is the reaction force?

a)

Gravity pulling the ball down.

b)

The ball hits the bat.

c)

Air resistance slowing the ball down.

d)

A home run.

113.

When a person pushes against the ground with their foot, the equal and opposite reaction force is

a)

when they start to move forward

b)

the ground pushing back on their foot

114.

If a person pushes down on a trampoline, why do they move back up into the air?

a)

The trampoline pushes back with a greater force than the person

b)

The trampoline pushes back with less force than the person

c)

The trampoline pushes back with an equal and opposite force as the person

115.

If you pushing on the ball is the action, what is the reaction?

a)

the ball pushing back

b)

the ball moving forward

116.

The action is the fist hitting the wall. The reaction is ...

a)

wall hitting fist

b)

wall moving back

c)

fist moving back

117.

You push on a wall with a force of 30 N. The wall reacts and pushes back with how much force?

a)

0 N

b)

10 N

c)

20 N

d)

30 N

118.

Based on Newton's 3rd law, when a person on a skateboard throws a concrete block forward, the person will be pushed ___________.

a)

to the left

b)

to the right

c)

forward

d)

backward

119.

A book pushes down on a table with a force of 5N, the table..

a)

Pushes back with a force of 5N

b)

Pushes back with a force less than 5N

c)

Pushes back with a forcec greater than 5N

d)

Does nothing. A table has no force.

120.

According to Newton’s Third Law, if someone jumps off a skateboard, the skateboard will roll backward because -

a)

the mass of the skateboard is the same as the mass of the person jumping off.

b)

the pull of gravity on the person is the same as on the skateboard, regardless of size.

c)

the air resistance on the person is great and the friction on the skateboard is small.

d)

for the force that sent the person forward, there is an equal force pushing back on the skateboard.

121.

A ball bat hits aball with a force of 100 Newtons. What is the force and direction exerted by the ball on the bat?

a)

100 Newtons, same direction

b)

100 Newtons, opposite direction

c)

200 Newtons, same direction

d)

200 Newtons, opposite direction

122.

What is the unit to MEASURE force?

a)

Kilogram

b)

Meter

c)

Pounds

d)

Newton

123.
What force holds the planets in motion around the sun?
a)
Magnetic
b)
Electrical
c)
Gravitational
d)
Air Resistance
124.

When an object is moving, friction acts in the _______ direction as the motion.

a)

perpendicular

b)

same

c)

opposite

d)

precise

125.

A type of friction that occurs when air pushes against a moving object it to decelerate.

a)

surface area

b)

air resistance

c)

velocity

d)

gravity

126.

A contact force is from

a)

objects physically touching

b)

far apart objects

c)

not touching object

d)

always a pull

127.

The three examples pictured are of

a)

Non-contact Forces

b)

Contact Forces

128.

The force that causes objects with mass to attract one another.

a)

Weight

b)

Gravity

c)

Mass

d)

Magnetism

129.
What is a PUSH or PULL of an object?
a)
Motion
b)
Force
c)
Friction
d)
Gravity
130.

What is a force that acts at a distance?

a)

A force that requires contact

b)

can be applied without contact between objects

131.

Applied force

a)

Contact force

b)

Force at a distance

132.

Normal Force

a)

Contact force

b)

Force at a distance

133.

Friction

a)

Contact Force

b)

Force at a distance

134.

Air Resistance

a)

Contact Force

b)

Force at a distance

135.

Gravity

a)

Contact Force

b)

Force at a distance

136.

Electrical Force

a)

Contact

b)

Force at a distance

137.

Magnetism

a)

Contact

b)

Force at a distance

138.

A force exerted by a compressed or stretched spring upon any object that is attached to it.

a)

Spring Force

b)

Tension Force

c)

Elastic Force

139.

A force that resists motion between two surfaces that are pressed together.

a)

Spring Force

b)

Normal Force

c)

Friction Force

140.

The force that is transmitted through a string, rope, cable or wire when it is pulled tight.

a)

Spring Force

b)

Tension Force

c)

Elastic Force

141.

Acts on an object as it travels through air

a)

Normal force

b)

Air resistance

c)

Spring force

142.

The support force exerted upon an object that is in contact with another stable object.

a)

Gravity

b)

Electrical Force

c)

Normal Force

143.

The repelling or attracting force between a magnet and a ferromagnetic material (like iron).

a)

Magnetic Force

b)

Electrical Force

c)

Gravity

144.

Leanna decided to rearrange her bedroom by moving her dresser to the opposite wall. She tried pushing it, but found that the dresser would not move. What force was Leanne NOT able to overcome?

a)

normal force

b)

gravitational force

c)

tension force

d)

frictional force

145.

Rina’s mother asked her to help move some items from the hall closet to the garage. One item she wanted to move was a large box of old school books. Rina tried to lift the box, but could not pick it up. What force was Rina NOT able to overcome?

a)

frictional force

b)

gravitational force

c)

applied force

d)

normal force

146.

Look at the illustration below of a block sitting on a table-top. The magnified view illustrates a force that exists between the two objects.

Which type of force is demonstrated in the magnified view?

a)

normal force

b)

applied force

c)

gravitational force

d)

frictional force

147.

The force of pushing a chair across the floor of a room

a)

Normal force

b)

Applied Force

c)

Gravitational Force

d)

Spring Force

148.

Normal Force can be defined as:

a)

any observed push or pull from any other source

b)

pushes out from surface

c)

resistive force when moving through air

d)

opposes surface from sliding against each other

149.

Applied Force can be defined as:

a)

any observed push or pull from any other source

b)

pushes out from surface

c)

resistive force when moving through air

d)

opposes surface from sliding against each other

150.

Check all of the forces that are acting on this object (this rad old guy)

a)

Normal Force

b)

Frictional Force

c)

Gravitational Force

d)

Tension Force

e)

Applied Force

151.

This force is a support force when you're leaning against a surface.

a)

Applied force

b)

Normal force

c)

force of Gravity

d)

Air resistance

152.

The upward force acting on the gymnast by the rope is called __________________.

a)

Force of tension

b)

Force of gravity

c)

Normal Force

d)

Force of friction

153.
What pulls a ball back to earth?
a)
Gas
b)
Gravity
c)
Friction
d)
Molecules
154.

what force is pulling the apple down?

a)

gravitational force

b)

tension

c)

normal reaction

155.

True or False: The gravitational force is always straight down.

a)

True

b)

False

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