NEW
Font size
S
M
L
XL
WorksheetsWork, Power and Machines
Total questions: 45
Worksheet time: 3hrs 39mins
Name
Class
Date
1.
It takes 20 N of force to move a box a distance of 10 m. How much work is done on the box in Joules?
a)
200 J
b)
20.0J
c)
100 J
d)
10 J
2.
All of the following describe situations in which work is done by an organism EXCEPT for which situation?
a)
A bird carries a worm to it's nest
b)
A squirrel hides a nut in a tree
c)
Ants bring crumbs into their homes
d)
Leave decompose on the forest floor
3.
Work done = Force x blank?
a)
a. distance
b)
b. acceleration
c)
c. velocity
d)
d. speed
4.
In which of the following situations do your arms do work on books?
a)
holding a heavy stack of books while standing
b)
carrying a heavy stack of books
c)
dropping a stack of books onto a table
d)
picking up a pile of books from the floor
5.
You apply a force of 18 N to a dresser and move it 3.0 m. How much work did you do on the dresser?
a)
54 J
b)
6.0 J
c)
21 J
d)
27 J
6.
What is the unit used to measure Power?
a)
Joule
b)
Watt
c)
Newton
d)
Pascal
7.
A job is done slowly, and an identical job is done quickly. Both jobs require the same amount of ___, but different amounts of _____
a)
work, energy
b)
power, work
c)
work, power
d)
force, work
8.
What type of simple machine is found on the cap of a pickle jar?
a)
lever
b)
inclined plane
c)
pulley
d)
screw
9.
Which of these is an example of a wedge?
a)
skateboard
b)
broom
c)
stairs
d)
butter knife
10.
Which is an example of someone using a simple machine to do work?
a)
a boy runs across a football field
b)
a banker counts money
c)
a mother pushes a stroller up a ramp
d)
a girl eats a sandwich
11.
Which of the following does a simple machine do?
a)
allows the users to apply less force over a longer distance
b)
reduce the amount of force needed to do work
c)
Both of the above
12.
Consists of two circular objects; a central shaft and a wheel.
a)
wheel and axle
b)
screw
c)
pulley
13.
A fishing pole is an example of a compound machine. What simple machines are 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
14.
If an object is too heavy to move up a ramp, what is the best way to fix the problem?
a)
Increase the slope of the ramp
b)
Increase the elevation of the ramp
c)
Increase the length of the ramp
d)
Increase the friction of the ramp
15.
How are Horsepower and watts similar?
a)
both units of work.
b)
they are both useless
c)
They are both the si units of work
d)
they are both units of power
16.
One horsepower is equal to ____ watts.
a)
744
b)
746
c)
789
d)
647
17.
A machine is a device that changes _____.
a)
Time used
b)
Input force used
c)
Distance
d)
A force
18.
Machine changes all but ?
a)
Distance
b)
Size of a force needed
c)
The direction of a force
d)
Having to increase input force if you want the output force to increase.
19.
what is work input?
a)
The work done by the input force acting through the input distance
b)
The force you exert on a machine
c)
The distance the input force acts through is known as the input distance.
d)
Horsepower
20.
What is input distance?
a)
The work done by the input force acting through the input distance
b)
The distance the input force acts through is known as the input distance.
c)
The force you exert on a machine
d)
Watts
21.
What is the SI unit of power?
a)
Watt
b)
Joule
c)
Horsepower
d)
force
22.
What is a wedge?
a)
A combination of two or more simple machines that work together.
b)
A v shaped object whose sides are two inclined planes sloped toward each other
c)
A combination of two or more simple machines that work together.
23.
What is the ideal mechanical advantage?
a)
All of these
b)
none of these
c)
The mechanical advantage of a machine in the absence of friction
d)
The number of times that a machine increases an input force.
24.
Which of the following does a simple machine do?
a)
reduce the amount of work needed to do work
b)
reduce the amount of force needed to do work
c)
Both of the above
25.
A simple machine is a device that helps to reduce the amount of _____ required to work.
a)
force
b)
energy
c)
work
26.
____ is done when a force is applied over a distance.
a)
energy
b)
work
c)
force
27.
Consists of two or more simple machines.
a)
multiple machine
b)
compound machine
c)
duplex machine
28.
Which of the following is NOT an example of a compound machine?
a)
scissors
b)
fishing pole
c)
ramp
29.
A _____ is a fixed bar that us free to move around a fixed point known as a fulcrum.
a)
pulley
b)
inclined plane
c)
lever
30.
A lever is designed to:
a)
reduce the amount of force required to do work
b)
increase the amount of effort required
c)
increase the amount of energy needed to work
31.
A ______ is a grooved wheel with a rope running along the groove.
a)
lever
b)
pulley
c)
screw
32.
How can an incline plane reduce the amount of force required to lift an object?
a)
increase the length of the ramp
b)
increase the height of the ramp
c)
decrease the length of the ramp
33.
Consists of two circular objects; a central shaft (axle) and a wheel.
a)
wheel and axle
b)
screw
c)
pulley
34.
A simple machine that can split things apart or hold a door open.
a)
wedge
b)
screw
c)
lever
35.
A simple machine that is made up of an incline plane wrapped around a cylinder. It is often used to hold things together.
a)
lever
b)
screw
c)
wedge
36.
Which of the following is NOT an example of a compound machine?
a)
bicycle
b)
stairs
c)
lawn mower
37.
Flagpole
a)
wedge
b)
pulley
c)
incline plane
d)
wheel and axle
38.
Lightbulb
a)
wedge
b)
pulley
c)
incline plane
d)
screw
39.
Stairs
a)
wedge
b)
pulley
c)
inclined plane
d)
wheel and axle
40.
Pedals, handle bars and handbrakes on a bicycle
a)
wedges
b)
pulleys
c)
incline planes
d)
levers
41.
This device
a)
wedge
b)
lever
c)
incline plane
d)
wheel and axle
42.
This device
a)
wedge
b)
lever
c)
incline plane
d)
wheel and axle
43.
F=200 N
d=50 m
w=??
d=50 m
w=??
a)
4 J
b)
0.25 J
c)
250 J
d)
10,000 J
44.
W=125 J
d=10 m
F=???
d=10 m
F=???
a)
12.5 N
b)
1250 N
c)
0.08 N
d)
135 N
45.
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
Reset
