Question

Two particles starts simultaneously from a point `O` and move along line `OP` and `OQ`, one with a uniform velocity `10m//s` and other from rest with a constant acceleration `5m//s^(2)` repectively. Line `OP` makes an angle `37^(@)` with the line `OQ`. Find the time at which they appear to ecah other moving at minimum speed?

Answer 1

Correct Answer - `t = 1.6 sec`.
They will have minimum relative velocity when their horizontal components are same.
`ucos 37^(@) = at rArr 10 xx 0.8 = 5t rArr t = 1.6 sec`