Answer to Question #342760 in Physics for Jani

Question #342760

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

Expert's answer

The total time of motion

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

Hence

"v_0=gt\/2\\\\\n=9.8*4\/2=19.6\\:\\rm m\/s"

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