A pebble is thrown vertically upwards from a bridge with an initial velocity of 4.9 m/s. It strikes
Channel: Doubtnut
Date: 2020-02-02

A pebble is thrown vertically upwards from a bridge with an initial velocity of 4.9 m/s. It strikes the water at 2s. If acceleration due to gravity is 9.8 `m//s^(2)` (a) what is the height of the bridge ? (b) with what velocity does pebble strike the water ?