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WorksheetsForce, Work, and Power
Total questions: 66
Worksheet time: 6hrs 34mins
Name
Class
Date
1.
What is the unit used to measure Power?
a)
Joule
b)
Watt
c)
Newton
d)
Pascal
2.
Force X Distance = _______?
a)
Work
b)
Power
c)
Energy
d)
Force
3.
Which two factors affect the gravitational attraction between two objects?
a)
Density and Friction
b)
Mass and Distance
c)
Density and Distance
d)
Mass and Friction
4.
Which example shows an unbalanced force?
a)
A pencil sitting on a desk
b)
a car parked in a parking lot
c)
a coat laying on the floor
d)
a child sliding down a slide
5.
Which of these is an example of a balanced force?
a)
A book sitting on a chair
b)
a ball rolling down the road
c)
a fish swimming in its bowl
d)
a person pushing a box
6.
Distance/Time = __________?
a)
Speed
b)
Force
c)
Work
d)
Power
7.
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
8.
Where should the fulcrum be placed in order for the student to use the least amount of effort possible?
a)
point A
b)
point B
c)
point C
d)
point D
9.
Your mass increases as you grow. How does this affect the force of gravitational attraction between you and other objects?
a)
the force decreases
b)
the force increases
c)
the force stays the same
d)
the force does not change without a change in distance.
10.
A _____ is a fixed bar that rest on a pivot. It is used move heavy loads around a fixed point known as a fulcrum.
a)
pulley
b)
inclined plane
c)
lever
11.
What type of simple machine is found on the cap of a pickle jar?
a)
lever
b)
inclined plane
c)
pulley
d)
screw
12.
What is the unit used to measure work?
a)
Joule
b)
Watt
c)
Newton
d)
Pascal
13.
Which of these is an example of a wedge?
a)
skateboard
b)
broom
c)
stairs
d)
butter knife
14.
A fishing pole is an example of a compound machine. What are all the simple machines used to make up this compound machine?
a)
lever, wheel and axle, pulley
b)
wheel and axle, inclined plane, pulley
c)
wheel and axle, pulley, inclined plane
15.
Consists of two circular objects; a central shaft and a wheel.
a)
wheel and axle
b)
screw
c)
pulley
16.
Work/Time = ________?
a)
Force
b)
Speed
c)
Velocity
d)
Power
17.
Wheels on a skateboard most likely experiences-
a)
Rolling Friction
b)
Sliding Friction
c)
Fluid Friction
d)
Static Friction
18.
Calculate the amount of work done if you use a 100N force to push a 50 kg box 5 m across the kitchen floor.
a)
250 J
b)
500 J
c)
5000 J
d)
50,000 J
19.
Jeff is a landscaping contractor and lifts a rock weighing 600 pounds by wedging a board under the rock. Jeff weighs 150 pounds and puts all of his weight on the lever. How much mechanical advantage did the lever provide to Jeff in lifting the rock?
a)
0
b)
2
c)
4
d)
8
20.
If you use a crowbar to get the lid off of a bucket, what simple machine are you using?
a)
Inclined Plane
b)
Pulley
c)
Wheel and Axle
d)
Lever
21.
Using a lever, Joe is able to lift a 10,000 N car off of the ground with a force of 1000 N. What is the mechanical advantage of the lever?
a)
1
b)
10
c)
100
d)
1000
22.
What does this graph represent?
a)
Constant Speed
b)
Acceleration
c)
Not moving
23.
A 16 N force is applied to an object and 96 J of work is done. How far was the object moved?
a)
6 m
b)
16 m
c)
80 m
d)
1536 m
24.
An object at rest will _______ if no outside forces are applied.
a)
Stay at rest
b)
Increase Velocity
c)
Decrease Mass
25.
A watt is defined as ___________
a)
One joule per second
b)
One horsepower per second
c)
A force of one pound over a distance of one foot
d)
A force of one newton over a distance of one meter
26.
Which line shows a negative acceleration ?
a)
A
b)
B
c)
C
d)
D
27.
What is the motion described in the graph
a)
Constant position
b)
constant speed
c)
constant acceleration
d)
All of the above
28.
Can be measured in meters (m)
a)
Distance
b)
Time
c)
Speed
d)
Acceleration
29.
Can be measured in meters per second (m/s)
a)
Distance
b)
Time
c)
Speed
d)
Acceleration
30.
Can be measured in meters per second squared (m/s2)
a)
Distance
b)
Time
c)
Speed
d)
Acceleration
31.
Which runner won the race?
a)
A
b)
B
c)
C
32.
Which runner had a head start?
a)
A
b)
B
c)
C
33.
At what time did runner A pass runner B?
a)
0 seconds
b)
1 second
c)
2 seconds
d)
3 seconds
34.
To make this rock move more easily, should he move the fulcrum closer to himself?
a)
Yes
b)
No
35.
For a lever to be a first class lever the fulcrum needs to be ..
a)
between the load and the effort
b)
on one side and the load and effort on the other side
c)
on the same side as the load arm.
36.
An object at rest or moving at a constant speed in a straight path will continue to do so until a net force acts upon it.
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
d)
Newton's 4th Law
37.
Which of the following is not an inclined plane
a)
shovel
b)
screw
c)
ramp
d)
wedge
38.
Mechanical Advantage
a)
changes the direction of the force
b)
reduces the effort needed to lift the load
c)
neither
39.
Which type of lever is this?
a)
First Class Lever
b)
Second Class Lever
c)
Third Class Lever
40.
For a lever to be a first class lever the fulcrum needs to be ..
a)
between the load and the effort
b)
on one side and the load and effort on the other side
c)
on the same side as the load arm.
41.
Work is...
a)
energy from the sun
b)
a type of machine
c)
a force that moves an object
d)
a force that pulls you toward the earh
42.
What is the unit of force?
a)
Meter
b)
Centimeter
c)
Newton
43.
Speed and acceleration are not the same things.
a)
True
b)
False
44.
If the net force is 0 the object is...
a)
in motion
b)
in the same place
c)
unbalanced
45.
What is the net force?
a)
17 N Right
b)
3 N Right
c)
3 N Left
d)
17 N Left
46.
What is force?
a)
A force is a push or a pull upon an object resulting from the object's interaction with another object.
b)
The rate at which an object changes its velocity.
c)
It is the amount of space between two points.
d)
It is Superman's power
47.
What is Newton's First Law
a)
F=ma
b)
Every action has an equal and opposite reaction
c)
An object at rest stays at rest, an object in motion stays in motion.
d)
Friction
48.
A person is pushed forward into their seatbelt when a car stops. Which Newtons Law does this represent?
a)
1st
b)
2nd
c)
2 and 3
d)
3rd
49.
In order for the person to push the box, they must overcome which forces?
a)
The mass of the box only
b)
His own mass
c)
His own mass and the box
d)
The force of friction on the box
50.
A fixed pulley, like the one pictured, will
a)
move to the right
b)
move to the left
c)
remain still, balanced forces
51.
How can you decrease the effort force needed to push a weight to the top of the ramp?
a)
cover the surface with carpet
b)
increase the length of the ramp
c)
increase the height of the ramp
d)
decrease the length of the ramp
52.
How does a single fixed pulley, like the one seen here, help you do work?
a)
changes the direction of the force
b)
increases the amount of applied force
c)
decreases the amount of applied force
d)
allows you to pull the rope a shorter distance
53.
Barbie sits on one end of a see-saw and Ken sits on the other. Barbie goes up in the air and Ken stays down on the ground. In order for Ken to make Barbie move down, he should
a)
stand on the board
b)
push down on the board
c)
move towards the center
d)
move away from the center
54.
Mechanical advantage is a measure of how much a machine multiplies the input
a)
efficiency.
b)
force.
c)
power.
d)
work.
55.
Calculate the amount of work done if you use a 100N force to push a 50 kg box 5 m across the kitchen floor.
a)
250 J
b)
500 J
c)
5000 J
d)
50,000 J
56.
What is the primary mechanical advantage of using the simple machine seen in the image?
a)
You can apply a large force and have it penetrate over a very long distance.
b)
You can apply a long distance and have it convert into a very short distance.
c)
You can apply a short distance and have it multiplied to penetrate a large distance.
d)
You can apply a small force to penetrate something that normally requires a large force.
57.
Jeff is a landscaping contractor and lifts a rock weighing 600 pounds by wedging a board under the rock. Jeff weighs 150 pounds and puts all of his weight on the lever. How much mechanical advantage did the lever provide to Jeff in lifting the rock?
a)
0
b)
2
c)
4
d)
8
58.
Using a lever, Joe is able to lift a 10,000 N car off of the ground with a force of 1000 N. What is the mechanical advantage of the lever?
a)
1
b)
10
c)
100
d)
1000
59.
Elevators lift loads by employing a motor and a complex system of pulleys. If the elevator converts all the energy used to work (no heat or friction is generated), how many Joules would be required to lift a 2,500 N load 15 m? This is about five floors in a typical building.
a)
1637 J
b)
3827 J
c)
37500 J
d)
167 J
60.
A 16 N force is applied to an object and 96 J of work is done. How far was the object moved?
a)
6 m
b)
16 m
c)
80 m
d)
1536 m
61.
A lever and fulcrum are used to lift a fallen tree, which has a weight of 480 N. If the lever has a mechanical advantage of 5.5, what is the input force that will begin lifting the tree off the ground?
a)
5.5 N
b)
40.7 N
c)
87.3 N
d)
2640 N
62.
To lift a load off the ground, the force required is equal to the weight of the load. In case of a lever, however, a small effort force can be used to lift a much heavier load. How is this possible?
a)
Levers use the weight of the load combined with the effort to lift the load.
b)
Levers combine the weight of the load with the force of gravity to lift the load.
c)
Levers reduce the force required by increasing the distance over which the force is applied.
d)
Levers distribute the load over their length, thereby reducing the force required to lift the load.
63.
A sales clerk at a local hardware store sells you a hammer with a mechanical advantage of 10 when used to pry up nails. You are able to create a force of 60 N. Using the hammer, what would be the maximum force that could be generated to remove a nail?
a)
0.167 N
b)
6 N
c)
600 N
d)
6000 N
64.
This pulley
a)
has a mechanical advantage of 1 and does not make work easier.
b)
has mechanical advantage of 2 and reduces the force needed to lift an object.
c)
has a mechanical advantage of 2 and changes the direction of the applied force.
d)
has a mechanical advantage of 1 and changes the direction of the force needed to lift an object.
65.
Devin decides to start a summer job mowing lawns. In his first job, he pushes his lawn mower a total of 1.5 km. The lawn mower weighs 10 kg. During this job, Devin pushes the mower with an average force of 75N. Determine the amount of work done by Devin when mowing the lawn.
a)
15 J
b)
15000 J
c)
112500 J
d)
112.5 J
66.
Jonathan must lift a 3000N rock using a lever. Jonathan uses 300N of force to push down on the lever to move the rock. What is the ratio of the load to effort in this case?
a)
1:3
b)
3:1
c)
1:10
d)
10:1
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