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What is the efficiency of a crane that used current of 8A at 150V to raise 450kg load at the rate of every minutes?
8 years ago

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Damon
Rate of WHAT every how many minutes?
Please check what you type.

Power in = i V = 8 * 150 watts or Joules/second

Useful work done per second in Joules/sec
= m g h/(60*minutes)

8 years ago

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