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The mass of a man standing on the ground is 50kg. The area of each the foot of the man is 0.2 sq.m. What is the pressure exerted by the man on the ground |
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Answer» Given that ,A MAN whose mass is 50kg climbs up 30 steps of a STAIR in 30seach STEP is 20 cm highHeight at 30 steps , h=30×0.2=6 mChange in potential energy , =mgh=50×10×6=3000 JSo, WORK done by the man , W=3000 JPower used , P= tW = 303000 =100 W |
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