Category Questions

A ball is thrown vertically upwards with a velocity of 20ms−1 from the top of a multistorey building. The height of the point where the ball is thrown 25 m from the ground. How long will it be before the ball hits the ground ? Take g=10ms−2. 

A ball is thrown vertically upwards with a velocity of 20ms−1 from the top of a multistorey building. The height of the point where the ball is thrown 25 m from the ground. How long will it be before the ball hits…