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A ball of mass 2 kg is thrown from a tal...

A ball of mass 2 kg is thrown from a tall building with velocity,
`v=(20 m//s)hat(i)+(24 m//s) hat(j)` at time `t=0` s. Change in the potential energy of the ball after, `t=8` s is (The ball is assumed to be in air buring its motion between 0 s and 8 s, `hat(i)` is along the horizontal and `hat(j)` is along the vertical direction. (Take `g=10 m//s^(2)`)

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