Answer to Question #107814 in Mechanics | Relativity for Daniel Felipe

Question #107814
A crane is used to lift some building materials which weigh 112 kg from the ground to the top of a building.

If the building materials are being raised by an electrical winch at a speed of 2.13 m s−1 then at what rate is the winch using electrical power? (in W to 3 s.f)
1
Expert's answer
2020-04-05T14:43:05-0400

electrical power used Force"\\times" Velocity

force"=112\\times9.8N"

velocity"=2.13\\frac{m}{sec}"

hence electrical power used"=112\\times9.8\\times2.13=2337.888W"


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