A pebble is thrown vertically upwards from a bridge with an initial velocity of 4.9ms−1. It strikes the water after 2s. Height of the bridge is:
A ball is thrown vertically upwards from the top of a tower with an initial velocity of 19.6m/s. The ball reaches the ground after 5s. Calculate
1. The height of the tower
2. The velocity of ball on reaching the ground.
(Take g=9.8m/s)