How long will it take a 2150 W motor to lift a 310 kg piano to...

Question

Question

How long will it take a 2150 W motor to lift a 310 kg piano to a six story window locate 16.0 m a above ground? Express your answer in seconds.

Answer 1

Answer #1

Solution:

Given:

Power (P) = 2150 W

mass (m) = 310 kg

height (h) = 16 m

So, Work done (W) = m g h = (310 kg)(9.81 m/s²)(16 m) = 48657.6 J

Since : P = W / t

Thus: Time taken (t) = W / P = (48657.6 J) / (2150 W) = 22.63 sec

Answer 2

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