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A ball is gently dropped from a height of $20 m$ . If its velocity increases uniformly at the rate of $10 m / s²$ , with what velocity will it strike the ground__ $m / s$ ?

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Detailed Solution

A ball is gently dropped from a height of

20 m

. If its velocity increases uniformly at the rate of

10 m / s²

, then the velocity would be

20 m / s

.
Given:

u = 0, S = 20 m, a = 10 m / s² .

Formula:

v² - u² = 2 aS

Here,

v =

final velocity,

u =

initial velocity,

a =

acceleration and

S =

distance
Putting all the values, we get,
⇒

v² - 0 = 2 \times 10 \times 20

⇒

v = 20 m / s

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