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Question: Answered & Verified by Expert
At a particular height, the velocity of an ascending body is $\mathbf{u}$. The velocity at the same height while the body falls freely is
PhysicsMotion In One DimensionWBJEEWBJEE 2016
Options:
  • A $2 \mathbf{u}$
  • B $-\mathbf{u}$
  • C $\mathbf{u}$
  • D $-2 \mathbf{u}$
Solution:
1846 Upvotes Verified Answer
The correct answer is: $-\mathbf{u}$
Given that velocity of ascending body = u

Let there is no air resistance when body falls freely in downward direction, the direction of falling body will opposite to the ascending body.
$\therefore$ The velocily at the same height while the body falls freely $=-u$

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