Question

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Answer 1

go through this solution. this will help you out . okay , thank you ❤️❤️

Answer 2

As the initial velocity of the ball is 49 m/s, the same of the lift is 5m/s and the force exerted on them is at same time therefore the ball would have already crossed the lift...
The ball would cross the lift second time while coming down towards the earth (assuming the ball is thrown while being at earth).