Question #317275

A man of mass 50kg ascends a flight of stairs 5m high in 5 seconds.If acceleration due to gravity is 10m/second-2.The power expended is???

Expert's answer

The power

P=Wt=mghtP=\frac{W}{t}=\frac{mgh}{t}

P=50∗10∗55=500 WP=\frac{50*10*5}{5}=500\:\rm W


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