NCERT Example 2.3 - Motion in a Straight Line
Question: A ball is thrown vertically upwards with a velocity of 20 m s?� from the top of a multistorey building. The height of the point from where the ball is thrown is 25.0 m from the ground. (a) How high will the ball rise? (b) How long will it be before the ball hits the ground? Take g = 10 m s?�.
Answer: (a) Ball rises **20 m** above launch point; (b) Total time before hitting ground = **5 s**.
Full step-by-step NCERT solution with diagrams on Something by Zero.