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

Question

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

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Thái Dương 4 years 2021-08-07T06:15:33+00:00 1 Answers 15 views 0

Answers ( )

  1. Jezebel
    0
    2021-08-07T06:17:04+00:00
    Reply

    Answer:

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

    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.

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