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Force Unit Review

Total questions: 86

Worksheet time: 1hrs 10mins

Name
Class
Date
1.
Is this a balanced or unbalance force?
a)
Balanced
b)
Unbalanced
c)
Neither one
d)
Both
2.
Calculate the net force of the object in the image shown.
a)
20N
b)
35N
c)
5N
d)
25N
3.
Which direction will the object move?
a)
Up
b)
Down
c)
Right
d)
Left
4.
What is the net force of this object?
a)
0N
b)
50N
c)
25N
d)
5N
5.
If a force causes an object to move, it's considered a(n) __________________ force.
a)
Balanced
b)
Unbalanced
c)
Massive
d)
Strong
6.
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
7.
If a force of 50 Newton's was applied to an object with a mass of 500 grams, what will the object's acceleration be?
a)
10 m/s^2
b)
.1 m/s^2
c)
100 m/s^2
d)
1 m/s^2
8.

If an object is pushed with a force of 20N and moves with an acceleration of 2.0 m/s^2, what is the object's mass?

a)

10 kg

b)

40 kg

c)

20 kg

d)

0.1 kg

9.

If an object with a mass of 30 kg is moving with an acceleration of 4 m/s^2 what was the force used to push the object.

a)

7.5 N

b)

0.13 N

c)

120 N

d)

34 N

10.

Calculate the net force.

a)

0 N

b)

5 N

c)

25 N

d)

15 N

11.

a force exerted by an object with mass to

another object with mass. It is also called as gravity.

(a)  

12.

What is force in physics?

a)

A power in star wars

b)

A push or pull on an object

c)

A stop on an object

d)

The start of an object

13.

What can force do to an object?

a)

Accelerate an object

b)

Slow down an object

c)

Have the object remain in place

d)

Have the object change shape

e)

All of the above

14.

What is the measure of force?

a)

Newtons

b)

Light years

c)

Inches

d)

Gallons

15.

What is the unit for FORCE?

a)

N (Newtons)

b)

lbs (pounds)

c)

g (grams)

d)

m/s (meters per second)

16.
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.
17.
What force holds the planets in motion around the sun?
a)
Magnetic
b)
Electrical
c)
Gravitational
d)
Air Resistance
18.
Jupiter has about 317 times more mass than Earth. What can you infer from this fact? 
a)
That Jupiter’s gravitational force is much weaker than on Earth’s gravitational force.
b)
That Jupiter’s gravitational force is much stronger than Earth’s gravitational force.
c)
That Jupiter’s and Earth’s gravitational forces are equal.
d)
Mass has no effect on the gravitational force between two objects
19.
This type of force resist motion between two surfaces that are pressed together
a)
contact
b)
gravity
c)
friction
20.

What type of force was at work in the parachute?

a)

elastic spring force

b)

frictional force (air resistance)

c)

magnetic force

d)

gravitational force

21.
a)
Balanced
b)
Unbalanced
22.
a)
Balanced
b)
Unbalanced
23.

___________ is an opposing force that makes objects in motion slow down.

a)

force

b)

speed

c)

friction

d)

mass

24.

The girls in this picture represent ________ forces (or 2 objects in equilibrium). 

a)
kinetic
b)
balanced
c)
unbalanced
d)
chemical
25.
What will cause an object to move?
a)
Applied forces
b)
Balanced forces
c)
Unbalanced forces
26.
With unbalanced forces, the object will move in the direction of the _______ force.
a)
larger 
b)
smaller 
c)
equal 
27.

Balanced Force

a)

When forces are balanced, there is no change in motion

b)

When two forces act upon each other in opposite directions, and they are both the same size.

c)

Equal in size and opposite in direction

d)

Occurs when objects change in motion and can happen in two different ways.

28.

Which image is an example of a balanced force?

a)

Image 1

(Top Image)

b)

Image 2

(Bottom Image)

29.

Which boy will have an easier time getting down the hill?

a)

Boy A , because he is experiencing less friction than boy B.

b)

Boy B, because he is experiencing more friction than boy A.

30.

How does the mass of an object affect it's motion?

a)

It has no effect

b)

The less the mass the less effect a force will have

c)

The greater the mass the greater the effect a force will have

d)

The greater the mass the less effect a force will have

31.

What does the term displacement mean?

a)

The direction of motion

b)

The distance traveled divided by time

c)

The change of position of an object

32.
Which of the following is the closest match to the definition of motion?
a)
An objects change in position relative to a reference point
b)
The change in position of an object
c)
Constant speed
33.
What is the definition of velocity?
a)
A force that opposes motion
b)
Uniform circular motion
c)
The speed of an object in a particular direction
34.
What is the definition of speed?
a)
Distance/Time
b)
Change in velocity/Time
c)
A change in momentum
35.
How is velocity different than speed?
a)
Speed opposes velocity
b)
Velocity is speed with a direction
c)
None of the answers are correct
36.
Which of the following represents the equation for acceleration?
a)
a = ƒt/v
b)
a = Δt/f
c)
A = Λd/t
d)
a = Δv/t
37.
An object traveling in a circular motion is always changing its ______ and ______.
a)
rotation, velocity
b)
direction, velocity
38.
A force is an action exerted on a body in order to change the body's state of ______.
a)
Balance
b)
Being
c)
Proximity
d)
Motion
39.
A force that opposes motion between two surfaces that are in contact.
a)
Speed
b)
Velocity
c)
Friction
d)
Force
40.
The force that opposes the motion of two surfaces that are in contact and are sliding over each other.
a)
Static Friction
b)
Kinetic Friction
41.
a)
Balance Force
b)
Unbalanced Force
42.
a)
Speed
b)
Acceleration
c)
Displacement
43.
a)
Velocity
b)
Speed
c)
Uniform Circular Motion
44.
a)
Static Friction
b)
Kinetic Friction
c)
Sliding Friction
45.
How much work is being done with 200 N of force over 426 meters?
a)
85,200 J
b)
45,620 J
c)
90,480 J
d)
62,329 J
46.
If 150 Joules of work is needed to move a box 10 meters, what force was used? 
a)
1500 N
b)
15 N
c)
1.5 N
d)
150 N
47.

Which of the following is the best example of work being done.

a)

doing homework

b)

lifting a box

c)

pushing a stationary box

d)

holding a box

48.
In which of these cases is work being done? 
a)
A student sleeps
b)
A student pushes a locked door that does not move
c)
a student carries his chair into another room
d)
A student sits on the carpet
49.
True or false: when the distance an object moves is zero the work done on the object is also zero.  
a)
True
b)
False
50.
Work is done when a weightlifter holds a barbell still above his head.
a)
True
b)
False
51.

You push against the back of your friends car that is stuck. You push and be become very tired, but the car does not move. Did you do work?

a)

Yes, work was done

b)

No, work wasn't done

52.

What would 54N be an example of?

a)

work

b)

power

c)

distance

d)

force

53.

what would 1m be an example of?

a)

work

b)

power

c)

time

d)

distance

54.

what would 14J be an example of?

a)

work

b)

distance

c)

time

d)

force

55.

What is an example of a force?

a)

Energy

b)

Power

c)

Pressure

d)

Weight

56.
The amount of work done in a certain amount of time is known as 
a)
work
b)
effort force
c)
resistance force 
d)
power
57.

If you increase your work and decrease your time, you will have

a)

more power

b)

less power

c)

same amount of power

d)

power rating can not be determined

58.

What would you solve for if given time and work?

a)

power

b)

force

c)

distance

d)

work

59.

what would you solve for if given distance and force?

a)

work

b)

power

c)

time

d)

motion

60.

What would you solve for if you were given work and distance

a)

power

b)

time

c)

force

d)

motion

61.

If you have the same work as someone, but in less time

a)

You are more powerful

b)

You are less powerful

c)

You have the same power

62.

Person A and Person B are both using the same amount of work to lift something. Person A takes half as much time to do it. Who has greater power.

a)

Person A

b)

Person B

63.

What is a unit of power?

a)

Ohm

b)

Ampere (A)

c)

Volt (V)

d)

Watt (W)

64.
What is the definition of power?
a)
the amount of work an object does
b)
the rate at which force is applied
c)
the amount of matter in an object
d)
the rate at which work is done
65.
This is work divided by time.
a)
Work
b)
Distance
c)
Power
66.
Which of the following is the best example of work being done. 
a)
doing homework
b)
lifting a box
c)
pushing a stationary box
d)
holding a box
67.
A 5000N block is lifted 10 m. How much work was done?
a)
50000 J
b)
5000 J
c)
500 J
d)
50 J
68.
 Work done = Force x _________
a)
a. distance
b)
b. acceleration
c)
c. velocity
d)
d. speed
69.
A force exerted over a distance to move an object is ______________________.
a)
power
b)
work
c)
momentum
d)
Watt
70.

In which case is work being done?

a)

A

b)

B

c)

C

d)

D

71.

Joel and Jerry push against a car that has stalled, trying unsuccessfully to get it moving. Jerry stops after 10 min, while Joel is able to push for 5.0 min longer. Compare the work they do on the car.

a)

Joel does 75% more work than Jerry.

b)

Joel does 50% more work than Jerry.

c)

Jerry does 50% more work than Joel.

d)

Joel does 25% more work than Jerry.

e)

Neither of them does any work.

72.

ln the Empire State Building Run-Up, competitors race up the 1576 steps (86 flights) of the Empire State Building, climbing a total vertical distance of 320 m. How much work does a m 74 kg racer do?

a)

2.321 × 105 Joules

b)

2.326 × 105 Joules

c)

2.318 × 105 Joules

d)

2.317 × 105 Joules

73.

If a 74 kg racer took 798 s to climb the 320 m, how power did she developed?

a)

291 Watts

b)

281 Watts

c)

317 Watts

d)

313 Watts

74.

This weight lifter raised 105 kg to a height of approximately 2.31 m in 9 seconds. How much power did he developed?

a)

264 Watts

b)

1029 Watts

c)

2,377 Watts

d)

4,009 Watts

75.

A construction worker uses a pulley and a rope to raise an 85 kg person to a height of 2 m in 6 s. How much power is he supplying?

a)

1,670 W

b)

833 W

c)

278 W

d)

417 W

76.

A construction worker uses a pulley and a rope to raise an 85 kg person to a height of 2 m in 6 s. How much power is he supplying?

a)

1,670 W

b)

833 W

c)

278 W

d)

417 W

77.

Two movers applied a total force of 350 N to push chest up a ramp into a truck. If the work that they did 1,400 J, calculate the height of the ramp?

a)

4 m

b)

3 m

c)

2 m

d)

1 m

78.

750 J of work is done on a car jack to raise a car by 0.15 m. Calculate the upward exerted on the car.

a)

5,000 N

b)

113 N

c)

50 N

d)

11,300 N

79.

A motor produces 500.0 W of power in 15 s. How

much work is done?

a)

7,500 J

b)

33 J

c)

765 J

d)

8,000 J

80.
Look at the pressure triangle. How do we calculate the area?
a)
f ÷ a
b)
f x p
c)
p x f
d)
f ÷ p
81.
Look at the pressure triangle. How do we calculate the force?
a)
f ÷ a
b)
f x p
c)
p x a
d)
f ÷ p
82.

Pressure is measured in what units

a)

Newtons

b)

m/s

c)

Pascals

d)

Kg

83.
Pressure decreases when the surface area over which a force is applied increases
a)
True
b)
False
84.

A cardboard box weighs 30N. If we added weight to the box, what would happen to the pressure?

a)

increase

b)

decrease

c)

stay the same

85.

A force of 240 N is applied to an area of 6.0m2. how much pressure is being applied to the surfaced?

a)

14,400 Pa

b)

40 Pa

c)

240 Pa

d)

6.0 m2

86.

A force creates a pressure of 12 Pa over an area of 6.0 m2. What is the magnitude of this force?

a)

72 N

b)

12 N

c)

6.0 N

d)

2 N

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