Problem

Asked by Tahira | 31st Oct, 2009, 06:03: PM

Expert Answer:

work done = force x displacement

                    = ( mass x acceleration ) x displacement.

Here veloicty = a (x) -1/2   , displacement = ( b - 0 ) = b

so, acceleration = dv / dt = - a x -2

Hence, work done = m ( - a x -2 ) b

                                  =  - m a b x -2

Answered by  | 1st Nov, 2009, 02:11: PM

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