Only 62) A 100 watt motor (60% efficient) is used to raise a 100 kilogram load 5

Mathematics
Tutor: None Selected Time limit: 1 Day

Oct 5th, 2015

Thank you for the opportunity to help you with your question!

60% of 100w is 100*0.6=60w

w(work)=mgh=100*9.8*5=4900j

P=w/t

=> 60= 4900/t

=> t=4900/60=81.66s

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Oct 6th, 2015

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