question_answer

Two particles A and B having different masses are projected from a tower with same speed. A is projected vertically upward B vertically downward. On reaching the  ground

A)  velocity of A is greater than that of B

B)  velocity of B is greater than that of A

C)  both A and B attain the same velocity

D)  the particle with the larger mass attains velocity

Correct Answer: C

Solution :

 The situation is diagrammatically as below When A is projected with a vertical speed the after sometime it comes on the same level with same speed as it was projected. Now, the downward speeds of A and B at the level-X is same. So, on reaching the ground, velocity of A and B are same.