Question

Q4.A ball thrown vertically upwards reaches to a height of 100 m. Find the initial velocity of
the ball if g = 10 ms-2. pls answer fast also pls give step by step explanation.




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Answer 1

Explanation:

The equation is given as v2−u2=2as.

where,

v = final velocity, 

u = initial velocity, 

a = acceleration due to gravity, 10m/s2, 

s = h = height traveled.

Therefore, we can find u with above info. In this case, v = 0 at the top of the path.

0−u2=2×10×5=10m/s.

Hence, the initial velocity of the ball was 10 m/s.