A boy of mass 40 kg climbs a staircase of 30 steps, each of 0.2m height, in 30 s. Calculate power (g = 9.8 m/s2)
GSEB - Class 9 Chapter - 1. Work, Energy and Power Page 11
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power is rate of work done
that is. - work done/time.
mass is 40 kg
distance is 30* 0.2 is 6meter. ( work done - force * distance)
force is mass * acceleration
40*9.8
power is. 40*9.8*6
-------------
30
power ie 78.4 watts
that is. - work done/time.
mass is 40 kg
distance is 30* 0.2 is 6meter. ( work done - force * distance)
force is mass * acceleration
40*9.8
power is. 40*9.8*6
-------------
30
power ie 78.4 watts
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