Question #342760

A ball thrown vertically upward returns to its starting point at 4s. Find its initial speed.


1
Expert's answer
2022-05-20T04:53:41-0400

The total time of motion

t=2v0gt=2\frac{v_0}{g}

Hence

v0=gt/2=9.84/2=19.6m/sv_0=gt/2\\ =9.8*4/2=19.6\:\rm m/s


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