Question

An object thrown vertically upwards reaches a height of 500m . What was its initial velocity? How long will the object take to come back to the earth ? Assume g = 10m/s².
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Answer 1

Answer:

Let the initial velocity = u

final velocity = v

v= 0 m/s

s = 500 m

2gs = v

2

−u

2

2 (-10) 500 = u

2

u = 100 m/s

v = u + at

0 = 100 - 10 t

t = 10 s

total time taken = 20 sec.

Answer 2

Answer:

Initial velocity = 0

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