Question

1. A stone is projected vertically up with a velocity 'u' from the top of a tower reaches the
ground with a velocity '2u'. The height of the tower is
a)
Bu
c'
g
b)
2g
d)​

Answer 1

Answer:

Explanation:

If it is projected from top of tower then after time t it will come back to the tower with velocity u

If velocity u changes from u to 2u under influence of gravity then distance covered is height of building

From formula of motion

v²-u²=2as

Final velocity=2u

Initial velocity =u

4u²-u²=2*g*s

3u²/2g=S

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