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Work And Power
Test Description: Review questions on work and power.
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
a lot
B
a little
C
none
D
The exact amount of work and weight of the object must be known to figure this out.
2) Which of these is the unit of measure for work?
A
joules
B
pounds
C
newtons
D
watts
3) What is the correct formula for work?
A
Work= mass * acceleration
B
Work= force/distance
C
Work= force * distance
D
Work= force/time
4) Which of the following is NOT an example of work?
A
a person sliding on a box across the floor
B
a metal bar bracing a leaning brick wall
C
a windmill turning in the wind
D
an air bag deploying in an automobile wreck
5) What is the work done on a 34-N weight if it's lifted up 1 km?
A
17J
B
34J
C
34,000J
D
0.034J
6) A model rocket weighing 4.9 N launches from a pad. How much work does the little rocket engine do in the first 4 meters?
A
19.6J
B
192.08J
C
1.225J
D
0.5J
7) A 100 N force is applied to a plow by the horse pulling the plow. How much work does it take for the force to pull the plow 100 meters in 5 minutes?
A
10,000 N
B
250,000 N
C
3,000,000 J
D
10,000 J
8) What is the unit of measurement for power?
A
m/s2
B
joules
C
newtons
D
watts
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) A model rocket weighing 4.9 N launches from a pad. How much work does the little rocket engine do in the first 4 meters?
A
300 W
B
30 W
C
900 W
D
100 W
*select an answer for all questions
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