with what initial speed must you throw a ball vertically for it to reach a height of 20m? the ball weighs 15kg. how does your answer change if the ball weighs 30kg

Question

amistre64 · Answer

15*9.8 = 147 Newtons before the ball can even be lifted of the ground i believe

anonymous · Answer

$$V _{f}^{2} =V _{i}^{2} -2ad$$

anonymous · Answer

Vf =0 at the highest point
(a=g)

amistre64 · Answer

yeah; once a ball is set in motion, regardless of how much it weighs; its affected by gravity at the same rate of acceleration.

amistre64 · Answer

the amount of force needed to set it in motion differs; but that wasnt the problem was it :)

anonymous · Answer

But F=ma
@amistre64

anonymous · Answer

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