Question

2 An obiect thrown vertically upwards reaches the
height of 500 m What was its velocity ?(take g = 10 m/s)
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Answer 1

Explanation:

Let the initial velocity = u

final velocity = v

v= 0 m/s

s = 500 m 

2gs = v2−u2

2 (-10) 500 = u2

u = 100 m/s

v = u + at

0 = 100 - 10 t

t = 10 s

total time taken = 20 sec.

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