Question

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Updated on : 2022-09-05

Solution

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Correct option is A)

**Hint: Apply kinematical equations.**

**Correct Option: Option A**

**Explanation for correct answer:**

**Step 1: Find the length of train in terms of velocity and acceleration.**

- The displacement of the train is given by:

- If $L$ is the length of the train, then:

$L=2a(2u)_{2}+u_{2} =2a3u_{2} $ ------(1)

**Step 2: Find the velocity of midpoint.**

- As, midpoint is at distance $2L $ ,

$2L =2av_{2}−u_{2} $

$⇒4a3u_{2} =2av_{2}−u_{2} $

$⇒v=2.5 u$ $m/s$

**So, the velocity with which, the middle point of the
train passes the same point is $2.5 u$**
$m/s$.

Solve any question of Motion in a Straight Line with:-

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