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The speed of a train increases at a cons...

The speed of a train increases at a consant rate `alpha` from zero to v and then remains constant for an interval and finally decreases to zero at a constant rate `beta`. If l be the total distance described, and the total time then

A

`t = l/v + v/2 ( 1/alpha + 1/beta)`

B

`t = l/v - v/2 (1/alpha + 1/beta)`

C

`t= l/v - v/2 ( 1/alpha - 1/beta)`

D

`t = l/v + v/2 (1/alpha - 1/beta)`

Text Solution

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The correct Answer is:
A
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