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NTA Abhyas 2020
Exam
NTA Abhyas
Year
2020
Subject
Physics
Chapter
Motion in One Dimension

NTA Abhyas 2020 · Physics · Motion in One Dimension

A man in a balloon throws a stone downwards with a speed of 5m s ^...

A man in a balloon throws a stone downwards with a speed of 5ms−15m{s}^{- 1} with respect to the balloon which is moving upwards with a constant acceleration of 5ms−25m{s}^{- 2}. Find the velocity (in ms−1m{s}^{- 1}) of the stone relative to the man after 2s2s. (Take g=10ms−2g = 10m{s}^{- 2})

Correct answer

35

Step-by-step solution

Relative velocity of stone = 5ms−15m{s}^{- 1}

relative acceleration of stone = 10+5=15ms−210 + 5 = 15m{s}^{- 2}

v=u+at=5+15×2=35ms−1v = u + at = 5 + 15 \times 2 = 35m{s}^{- 1}

relative velocity after t=2st = 2s is 35ms−135m{s}^{- 1}
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