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A lift with open top is moving up with acceleration f. A body is thrown up with speed u relative to lift and it comes back to lift in time t. Then speed u is ... {g = acceleration due to gravity}

A lift with open top is moving up with acceleration f. A body is thrown up with speed u relative to lift and it comes back to lift in time t. Then speed u is ...
{g = acceleration due to gravity}

Grade:

1 Answers

kumar kanishk
36 Points
3 years ago
in a lift net acceleration = a + g
                                      = f + g
time of flight t = 2u / f+g
                     ft + gt = 2u
             so
                  u = ft/2 + gt/2

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