Question

The engine of a train passes an electric pole with a velocity u and last compartment with velocity v . calaculate the velocity with which midpoint crosses the train.

Answer 1

Mark it brainliest . See the attachment below

Answer 2

$\sqrt{\frac{u^{2} + v^{2} }{2} }$

Explanation:

Let the train's length = l

According to the motion's third equation,

$v^{2} - u^{2}$ = 2as

Since, s = l

$v^{2} - u^{2}$ = 2al

a = $v^{2} - u^{2} /2l$

At Mid-point, l = l/2

$v^{2} = u^{2} + 2a\frac{l}{2}$

= $\frac{2u^{2} + v^{2} - u^{2} }{2}$

= $\sqrt{\frac{u^{2} + v^{2} }{2} }$

Learn more: Find the velocity

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