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Work And Power
Test Description: Review questions!
Instructions: Answer all questions to get your test result.
1) How much work is done when a very large force is applied to an object but does not move the object?
A
none
B
a lot
C
a little
D
The exact amount of work and the weight of the object to figure this out.
2) Which of these is the unit of measure for work?
A
watts
B
joules
C
newtons
D
pounds
3) What is the correct formula for work?
A
Work=mass * acceleration
B
Work= force/time
C
Work= force * distance
D
Work= force/distance
4) Which of the following in NOT an example of work?
A
a windmill turning in the wind
B
a metal bar bracing a learning brick wall
C
an air bag deploying in an automobile wreck
D
a person sliding a box across the floor
5) What is the work done on a 34-N weight if it is lifted up 1 km?
A
34,000 J
B
34 J
C
17 J
D
0.034 J
6) A sailboat weighing 1,960 N moves at 3m/s for 10 minutes. What is the value for the work of the sails?
A
19,600 J
B
3,528,000 J
C
1,176,000 J
D
58,800 J
7) What are the units for power, work, and force?
A
Power is measured in watts, work is measured in newtons, and force is measured in joules.
B
Power is measured in newtons, work is measured in watts, and force is measured in joules.
C
Power is measured in joules, work is measured in newtons, and force is measured in m/sec2.
D
Power is measured in watts, work is measured in joules, and force is measured in newtons.
8) What units define a watt?
A
newtons/meter
B
newtons/seconds2
C
joules/meter
D
joules/second
9) What is the correct formula for power?
A
Power=work*distance
B
Power=work*time
C
Power= work/time
D
Power=force*distance
10) Power is measured in watts, work is measured in joules, and force is measured in
A
Newtons
B
M/s
C
Watts
D
None of the above
*select an answer for all questions
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