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A girl uses 60 J of energy to move a box from the floor to a shelf. How much power does she use if it takes her 3 s to move the box? 1. 15w 2. 20w 3.90w 4.180w
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25 votes
A girl uses 60 J of energy to move a box from the floor to a shelf. How much power does she use if it takes her 3 s to move the box?

1. 15w
2. 20w
3.90w
4.180w

User Pratik Stephen
by
3.5k points

1 Answer

9 votes

Answer: 2. 20W

Explanation: P = w/t

W = 60, t = 3s

60/3 = 20W

User Ronon
by
4.1k points
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