Question

A stone dropped from top of a wall reaches the surfaces of water in 2seconds.Find the velocity of the stone while it touches the deapth of the water surface from the top of the wall.​

Answer 1

Answer:

Given :

t = 2s

u = 0

a = 9.8 m/s²

s = ?

s = ut + ½ at²

s = 0 × 2 + ½ × 9.8 × (2)²

s = ½ × 9.8 × 2 × 7

s = 19.6m

Velocity = Displacement/Time

velocity = 19.6/2

velocity = 9.8m/s

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