Question : A ball is dropped from a bridge at a height of 176.4 m over a river. After 2 s, a second ball is thrown straight downwards. What should be the initial velocity of the second ball so that both hit the water simultaneously?
(A) 2.45 ms−1
(B) 49 ms−1
(C) 14.5 ms−1
(D) 24.5 ms−1
Answer : option (D)
Solution :
