A heavy stone is thrown from a cliff of height ‘h’ with a speed ‘v’. The stone will hit the ground with maximum speed if it is thrown

A heavy stone is thrown from a cliff of height 'h' with a speed 'v'. The stone will hit the ground with maximum speed if it is thrown

1. A

Vertically downward

2. B

Vertically upward

3. C

Horizontally

4. D

speed does not depend on initial direction

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Solution:

when a heavy stone is thrown from a cliff of height h, with speed v

It will travel with $\text{a}=-\text{g}$(in downward direction) and reach the ground with same speed ${\text{v}}^{\text{|}}$ because ${{\text{v}}_{\text{1}}}^{2}-{\text{v}}^{2}=+2\text{gh}$ in all cases

So we claim that maximum speed it attained is independent of direction in which it  is thrown.

Option (d) is correctly concluding the task.

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