a man has power of 90 watt and mass of 60kg runs up a staircase in 40seconds . if each step of staircasebis 20cm high calculate the number of steps
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let the numbers of steps be x
So
total distant = 0.2x m
work = 60 x 0.2x = 12x
power = 90
12x/40 = 90
x = 90 x 40/12
x = 300
So
total distant = 0.2x m
work = 60 x 0.2x = 12x
power = 90
12x/40 = 90
x = 90 x 40/12
x = 300
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