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1 vote
How much power is expended on a 20-N rock that you lift 1.5 meters up in 10 seconds?

A. 3 Joules
B. 30 Joules
C. 3 Watts
D. 30 Watts

1 Answer

3 votes

Answer:

The answer to your question is the letter C. 3 Watts

Step-by-step explanation:

Data

Power = ?

Force = 20 N

Distance = 1.5 m

time = 10 s

Formula

Work = force x distance

Power = Work/time

Process

a) Calculate the Work

Work = 20 x 1.5

Work = 30 J

b) Calculate the Power

Power = 30J/10s

Power = 3 Watts

The units of Power are Watts and the units of Work and energy are Joules.

User Bmotmans
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