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Q.

A lift is moving down with acceleration a. A man in the lift drops a ball inside the lift. The acceleration of the moving ball as observed by the man in the lift and by a man standing stationary on the ground are respectively

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a

g – a, g

b

g, g

c

g – a, g – a

d

a, g

answer is C.

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Detailed Solution

After dropping the acceleration of the ball is g downwards.

The acceleration w.r.t man in lift is g-a.

the acceleration w.r.t to man on ground g.

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