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WorksheetsChapter 5 Work and Power
Total questions: 14
Worksheet time: 14mins
Name
Class
Date
1.
The rate at which work is done.
a)
Joules
b)
Power
c)
Watts
d)
Newtons
2.
All of the following are examples of a force except.
a)
A tow truck moving another car.
b)
Getting pushed on a swing.
c)
Watching a movie
d)
Pulling a flag up the flag pole.
3.
Which of these is an example of work being done on an object?
a)
Holding a heavy pieve of wood at a construction site.
b)
Trying to push a car that doesn't move out of deep snow.
c)
Pushing a child on a swing.
d)
Holding a door shut on a windy day so it doesn't blow open.
4.
For work to be done on an object,
a)
Some force need only be exerted on the object.
b)
The object must move some distance as a result of a force.
c)
The object must move, whether or not a force is exerted on it.
d)
The object must not move.
5.
In order to do work on an object, the force you exert must be...
a)
The maximum amount of force you are able to exert.
b)
In the same direction as the object's motion.
c)
In a direction opposite to Earth's gravitational force.
d)
quick and deliberate.
6.
If you exert a force of 20 newtons to push a desk 10 meters, how much work do you do on the desk?
a)
200 joules
b)
30 joules
c)
10 joules
d)
100 joules
7.
The net force of any balance force will always be
a)
>0
b)
<0
c)
=0
d)
Depends on the input force.
8.
The formula for calculating work is...
a)
work=
force x distance
force x distance
b)
work=
force/distance
force/distance
c)
work=
newtons x meters
newtons x meters
d)
work = newtons/metwers
9.
If a tow truck does 1000 J of work in 5 seconds then what is the power being used?
a)
200 n
b)
2000 w
c)
2000 n
d)
200 w
10.
You push on a desk with a force of 120 N to the right. Your friend pushes on the same desk with a force of 90 N to the left. What is the net force on the desk?
a)
0 N
b)
30 N
c)
210 N
d)
65 N
11.
You do work on an object when you lift it off the floor onto a shelf.
a)
True
b)
False
12.
Power is measured in watts.
a)
True
b)
False
13.
Force is described by its strength and by the direction in which it acts.
a)
True
b)
False
14.
Power=
work x time
work x time
a)
True
b)
False
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