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A boy of mass 60 kg runs up a staircase of 60 steps in 1 minute. If the height of each step is 15 cm, find his power. Take g = 10 m/s² |
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Answer» Mass of the boy = 60kgNumber of steps in the staircase = 45height of each step = 15cm Value of 'g' = 10m/s²Time taken = 1 MIN = 60 secondsTo Find :Power of the BoyFormula Applied : Solution :Before substituting the GIVEN values in the formula, we have to find the total height climbed by the boy. The total climbed by the boy can be calculated by multiplying number of steps with height of each step.Now substitute the values in the formula of power of the body.Required ANSWER :The power of the boy is 67.5 w________________________________Learn More :Power of a machine is defined as the rate of work done by a machine. It is a SCALAR quantity.S.I. unit of power is Watt(W). Another unit of power is Horse Power (HP).If work done by a machine is 1 Joule in a time of 1 second, then power of the machine is 1 Watt. |
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