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Two particles are separated at a horizon...

Two particles are separated at a horizontal distance `x` as shown in (Fig. 5.57). They are projected at the same time as shown in the figure with different initial speed. Find the time after which the horizontal distance between the particles becomes zero.
.

A

`(x)/(u)`

B

`(u)/(2x)`

C

`(2u)/(x)`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
A
`u_(x_(1))t+u_(x_(2))t=x`
`[(u)/sqrt(3)cos 30^(@)+u cos 60^(@)]t=x`
`[(u)/sqrt(3)xxsqrt(3)/(2)+(u)/(2)]t=x rArr t=(x)/(u)`
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