A girl weighing 400 N climbs a vertical ladder. If the
value of g be 10 ms-2, the work done by her after
climbing 2 m will be
a) 200) b) 80J c) 8000 J d) 800)
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Answer:
weight = mg= 400
height = h = 2m
work = mgh = 400×2 = 800 N m = 800 J
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