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Time it takes to lift boxes when man has an average useful power output of 41.4 W

  • Thread starter mphysicsdc
  • Start date
  • #1

Homework Statement


If a man has an average useful power output of 41.4 W, what minimum time would it take him to lift fifty 15.0-kg boxes to a height of 1.88 m?


Homework Equations


1/2mv(final)^2 mgy(final) = 1/2mv(initial)^2 mgy(initial)

P=W/Δt

P=Fv

The Attempt at a Solution



Dont even know where to start
 

Answers and Replies

  • #2
ideasrule
Homework Helper
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How much energy is needed to lift those boxes?
 

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