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How much power is needed to lift a 20-kg object to a height of 4.0 m in 2.5 seconds?
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How much power is needed to lift a 20-kg object to a height of 4.0 m in 2.5 seconds?

User Kevin Lynch
by
4.9k points

1 Answer

2 votes

Answer:

313.92w

Step-by-step explanation:

Formula for power:

P=W/∆t = Fv

Givens:

m=20kg

∆y=4.0m

∆t=2.5s

a=9.81m/s²

In order to find power, we first need to solve for work.

W=Fd (force*displacement), f=mg

W=mg∆y

W=(20kg)(9.81m/s²)(4.0m)

W=784.8J

P=W/∆t

P=784.8J/2.5s

P=313.92 watts

User Jimmymcnulty
by
4.6k points
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