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

• A

  $2 \mathbf{u}$
• Correct answer
  B

  $-\mathbf{u}$
• C

  $\mathbf{u}$
• D

  $-2 \mathbf{u}$

Solution

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 $=-u$

Hence, the correct answer is option: 'B'.