WorksheetsWork, Power & Mechanical Advantage
Total questions: 25
Worksheet time: 1hrs 15mins
Name
Class
Date
1.
How much work is done in holding a 15 N sack of potatoes while waiting in line at the grocery store for 3 minutes?
a)
15 J
b)
45 J
c)
0 J
d)
5 J
2.
What is the equation for power?
a)
P = Work/time
b)
P = Force/time
c)
P = time/distance
d)
P = Work * time
3.
A person weighing 600 N gets on an elevator. The elevator lifts the person 6 m in 10 seconds. How much power was used?
a)
360 W
b)
60 W
c)
3600 W
d)
600 W
4.
800 Newtons of force moving a distance of 20 meters will be how much work done?
a)
40 J
b)
1,600 J
c)
400 J
d)
16,000 J
5.
What is the unit of measurement for Power?
a)
Joules
b)
Newtons
c)
Watts
d)
Meters
6.
45,000 Joules of work done in 90 seconds results in how much power?
a)
50 watts
b)
500 watts
c)
5000 watts
d)
4,050,000 watts
7.
If you push a coffee mug 1.4 m using a force of 5 N, the work done on the mug is?
a)
7 J
b)
6 J
c)
8 J
d)
9 J
8.
How far does a car that weighs 5,000 N go if 18,000 J of work is done on it?
a)
3.8 m
b)
3.7 m
c)
3.2 m
d)
3.6 m
9.
What is power?
a)
transfer a force through a distance
b)
the rate of speed
c)
the rate of work being done
d)
transfer of space over time
10.
Work done = Force x _________
a)
a. distance
b)
b. acceleration
c)
c. velocity
d)
d. speed
11.
A Mustang has more horsepower than your mom's minivan. What does this mean?
a)
The Mustang has a higher topspeed.
b)
The minivan has a worse gas mileage.
c)
The Mustang can do work faster.
d)
The Mustang will die.
12.
The unit used to measure work is the
a)
Watt
b)
Newton
c)
Joule
d)
meter
13.
Any device that makes work easier is called a ______________________.
a)
Joule
b)
prop
c)
lever
d)
machine
14.
The efficiency of a machine can be increased by reducing __________________________.
a)
effort
b)
resistance friction
c)
fulcrum
d)
friction
15.
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
16.
Force is a _____ or _______
a)
simple complex
b)
push pull
c)
up down
d)
in out
17.
What is the unit for mass?
a)
Kilogram (Kg)
b)
Newton (N)
c)
Joule (J)
d)
Watt (W)
18.
The amount of work done in a certain amount of time is known as
a)
work
b)
effort force
c)
resistance force
d)
power
19.
Work is done on an object when the object moves in the SAME direction in which the force is applied.
a)
True
b)
False
20.
What is the measure of how much input work is changed into output work?
a)
resistance force
b)
efficiency
c)
mechanical advantage
d)
effort force
21.
No machine in existence has 100% efficiency due to ____________________.
a)
magic
b)
friction
c)
smoke
d)
input
22.
A 5000N block is lifted 10 m. How much work was done?
a)
50000 J
b)
5000 J
c)
500 J
d)
50 J
23.
The more POWER you use to move an object, the more work you do.
a)
True
b)
False
24.
What is mechanical advantage?
a)
The advantage a machine has over a bicycle
b)
A measure of how much a simple machine reduces work
c)
A measure of when is the best time to use a simple machine
d)
A measure of the force amplification achieved by using a tool
25.
Newton was able to make a machine that had a larger output force than input force.
a)
false
b)
true
100 %
