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WorksheetsWork & Power
Total questions: 25
Worksheet time: 31mins
What are the units for work?
Joules
Watts
Meters
seconds
What are the units for power?
Joules
Watts
Meters
seconds
What are the units for force?
Joules
Seconds
Meters
Newtons
Distance is measured in....
Joules
Seconds
Meters
Newtons
Gravity is measured in....
Joules (J)
Seconds per meter (s/m)
Meters per seconds squared (m/s2)
Newtons (N)
A fork is an example of a
Pulley
Wedge
Wheel & Axle
Incline Plane
A roller skate is an example of a
Pulley
Wedge
Wheel & Axle
Incline Plane
A ramp is an example of a/an
Pulley
Wedge
Screw
Incline Plane
A box with a Force of 800 N is carried 4.0 m across a room. How much work is done?
3200 J
200 J
A planted palm tree is lifted into a truck. If it is moved with a force of 150 N and 4350 J of work is done, then how far is the crate being lifted?
5 m
4200 m
29 m
652500 m
How many 100-W light bulbs can I power if it takes me 25 seconds to run up two flight of stairs using 8575 joules of work?
85
25
3
8
What is the MA of a wheel with a radius of 10 cm and an axle of 5 cm?
50
2
0.5
15
True or False: By using machines, the amount of work done changes.
True
False
An inclined plane has a height of 4.0 m and a length of 12.0 m. What is the ideal mechanical advantage (IMA) of this inclined plane?
48.0
3.0
8.0
16.0
What is the difference between AMA and IMA?
IMA does not include friction while AMA does include friction.
IMA includes friction while AMA does not include friction.
Why do we use machines? Select the best answer.
Machines are cheap labor that does more work for us with less power.
Machines make work easier for us.
When is the mechanical advantage of an inclined plane equal to one?
When the length equals one and the height equals one only.
When the length equals 5 and the height equals 5 only.
When the length and the height are the same number.
Never.
There are three classes of levers. A nut cracker and a wheel barrow is an example of which class?
Class 1
Class 2
Class 3
None
There are three classes of levers. A pair of pliers and a see saw are an example of which class?
Class 1
Class 2
Class 3
None
There are three classes of levers. A fishing pole is an example of which class?
Class 1
Class 2
Class 3
None
For a single movable pulley, what is the IMA of this system?
1
2
3
4
True or False: A bike is an example of a compound machine that combines simple machines to work together.
True
False
Solve for PE: m = 30 kg g = 9.8 m/s2 h = 10 m
3 J
30.3 J
2940 J
29.4 J
Solve for KE: m = 22 kg v = 9 m/s
891 J
198 J
Calculate the potential energy of a 8.25 kg object sitting on a 7.00 meter high ledge.
565.95 J
565 J
570.0 J
566 J
