Question

A man in a balloon throws a stone downwards with a speed of 5 m/s with respect to balloon. The balloon is moving upwards with a constant acceleration of $5m/s^2$Then velocity of the stone relative to the man after 2 second is

• A. 10 m/s
• B. 30 m/s
• C. 15 m/s
• D. 35 m/s

Answer 1

The correct option is D

35 m/s

Relative velocity of stone = - 5 m/s
Relative acceleration of stone
- 10 - 5 = - 15 $m/s^2$
v = u + at = - 35 m/s

Relative velocity after t = 2 second is 35 m/s downwards