A man weighing 80 kg climbs a staircase carrying a 20 kg load . the staircase has 40 steps, each of 25 cm height . if he takes 20 seconds to climb , the work done is
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Explanation:
total mass is 100 kg.
and total distance covered by man is 40 *25/100=10m.
now work done =mgh
=100*10*10. (g=10)
10000.
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