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.
Initial velocity of the ball =
The time it will take to reach the maximum height:
The maximum height ball reached from building can be calculated by:
Maximum height from ground =
Time the ball will take from maximum height to reach ground:
So, the total time the ball will take to hit the ground =