Q. 684.8( 5 Votes )

A girl weighing 400 N climbs a vertical ladder. If the value of g be 10 m s-2, the work done by her after climbing 2 m will be:

A. 200 J B. 800 J

C. 8000 J D. 2000 J

Answer :

Since, Force = Mass * Acceleration

400 = 10m


m = 40


Work done = Mass * Acceleration * Height


= 40 * 10 * 2 = 800 J

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