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WorksheetsWork and Power Review
Total questions: 40
Worksheet time: 59mins
How much work is being done with 200 N of force over 426 meters?
(a)
If 150 Joules of work is needed to move a box 10 meters, what force was used?
(a)
You push against the back of your friends car that is stuck. You push and be become very tired, but the car does not move. Did you do work?
Yes, work was done
No, work wasn't done
If you increase your work and decrease your time, you will have
more power
less power
same amount of power
power rating can not be determined
If you perform the same work as someone else but in less time, you ...
are more powerful
are less powerful
have the same power
You are holding a 30 N sack of potatoes about 0.5 m above the ground while standing in line at the grocery store. You have been waiting for 2 minutes. How much power have you produced?
30 Watts
0.125 Joules
0.125 Watts
0 Watts
If 68 W of power is produced in 18 seconds, how much work is done?
(a)
How much time is needed to produce 720 Joules of work if 90 watts of power is used?
(a)
If 68 Joules were necessary to move a 4 Newton crate, how far was the crate moved?
(a)
You do work only when you exert a force on an object and move it
Work is a measurement of how much force is applied over a certain ______.
The unit for work is . . .
You push a cart with a force of 60 N a distance of 2 m. How much work have you done?
120 N*m
120 W
120 s
Which of the following is the best example of work being done.
doing homework
lifting a box
pushing a stationary box
holding a box
A 5000 N block is lifted 10 m. How much work was done?
(a)
How much work is produced when 350 N is used to move a car 5 m?
(a)
W=5000 Joules
t=???
What is an equivalent formula for force?
F=d×t
a=mF
F=dW
m=F×a
A force applied on a block accelerates across a horizontal, frictionless surface. The energy gained by the block is equal to which?
the momentum given to the block
the work done on the block
the power applied to the block
the impulse applied to the block
A weightlifter lifts two 300 newton weights 1.5 meters off the ground. How much work has he done?
(a)
You do 90 joules of work in 30 seconds. How much power have you generated?
(a)
When force is used to move an object across a distance, this is called...
effort
power
energy
work
What is the work done by a force of 10 N moving an object 5 meters in the direction of the force?
2 J
50 J
15 J
5 J
A student walked up a flight of stairs. Later, the same student ran up the same flight of stairs in less time. What can be concluded about the relative amounts of work performed and power produced by the student in these instances?
The work performed was the same in both instances. The power was greater when the student ran up the stairs.
The work performed was greater when the student ran up the stairs. The power was the same in both instances.
The work and power were the same in both instances because it was the same student on the same stairs.
The work performed and the power produced were both less when the student was running up the stairs than when walking up the stairs.
In 1984 in San Antonio, Texas, an entire hotel building was moved several blocks on 36 dollies. The mass of the building was about 1,450,000 kg. If 24,120,000 J of work was done with the applied force of 30,000 N, how far was the building moved?
(a)
