A small ball of mass m is released from rest at a height h, above ground at time t = 0. At time
t = t 0 , the ball comes to rest at a height h 2 above ground. Consider the ground to be perfectly rigid and neglect air friction. In the time interval from t = 0 to t = t 0 , pick up the correct statements -
Text Solution
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(a, c, d)
From the figure work done by gravity from
t = 0 to t = t 0 is
W = mg (h 1 – h 2 )
Since initial and final velocity of ball is zero its average acceleration will be zero. Since net work done is zero from time interval t = 0 to t = t 0 . Hence work done by forces except gravity is mg (h 2 – h 1 ).
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