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Two ends of a train moving with a consta...

Two ends of a train moving with a constant acceleration passes a certain point with velocity u and v. Show that the velocity with which the middle point of train passes the same point is `sqrt((u^(2)+v^(2))/(2))`

A

`3 m//s`

B

`15 m//s`

C

`30 m//s`

D

`300 m//s`

Text Solution

Verified by Experts

The correct Answer is:
C
Projection angle is `45^(@)` & `V_(y)=21 m//s`, projection spped is `V_(0) sin 45^(@)=21 rArr V_(0)=21xxsqrt(2)=30 m//s`
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