WorksheetsWork and Power
Total questions: 23
Worksheet time: 22mins
Name
Class
Date
1.
The unit used to measure work is the
a)
Watt
b)
Newton
c)
Joule
d)
meter
2.
Any device that makes work easier is called a ______________________.
a)
Joule
b)
prop
c)
lever
d)
machine
3.
A force exerted over a distance to move an object is ______________________.
a)
power
b)
work
c)
momentum
d)
Watt
4.
The efficiency of a machine can be increased by reducing __________________________.
a)
effort
b)
resistance friction
c)
fulcrum
d)
friction
5.
A simple machine with a straight slanted surface is a(n) __________________.
a)
lever
b)
wheel and axle
c)
inclined plane
d)
pulley
6.
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
7.
No machine in existence has 100% efficiency due to ____________________.
a)
magic
b)
friction
c)
smoke
d)
input
8.
A drill bit is an example of which machine?
a)
screw
b)
pulley
c)
ramp
d)
wedge
9.
A 5000N block is lifted 10 m. How much work was done?
a)
50000 J
b)
5000 J
c)
500 J
d)
50 J
10.
Force is a _____ or _______
a)
simple complex
b)
push pull
c)
up down
d)
in out
11.
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
12.
Flagpole
a)
wedge
b)
pulley
c)
incline plane
d)
wheel and axle
13.
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
14.
Stairs
a)
wedge
b)
pulley
c)
inclined plane
d)
wheel and axle
15.
Lightbulb
a)
wedge
b)
pulley
c)
incline plane
d)
screw
16.
What is the unit for mass?
a)
Kilogram (Kg)
b)
Newton (N)
c)
Joule (J)
d)
Watt (W)
17.
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
18.
Two or more simple machines used together is a
a)
compound machine
b)
wheel and axle
c)
block and tackle
d)
mechanical advantage
19.
Which is not a type of simple machine?
a)
spring
b)
screw
c)
pulley
d)
wedge
20.
An axe is an example of a
a)
pulley
b)
inclined plane
c)
screw
d)
wedge
21.
__________ is stored energy.
a)
Potential
b)
Kinetic
c)
None of the above
d)
All of the above
22.
Energy due to motion is ____________ energy.
a)
Potential
b)
Energy
c)
Kinetic
d)
Friction
23.
The amount of work done in a certain amount of time is known as
a)
work
b)
effort force
c)
resistance force
d)
power
100 %
