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NemiM [27]
3 years ago
7

11. A ball is thrown up and attains maximum height of 20 m. Calculate its initial speed. (g = 10 ms')

Physics
1 answer:
Archy [21]3 years ago
5 0

final velocity = 0

acceleration = - 10 m/ s 2

distance. = 20 m

u = ?

v^2 - u ^2 = 2 a s

0^2 - u^ 2 = 2 * -10 * 20

-u^2 = -400

u = √ 400

u = 20m / s

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