1.

Two particles P and Q simultaneously start moving from point A with velocities `15 m//s` and `20 m//s` respectively. The two particles move with acceleration equal in magnitude but opposite in direction. When P overtakes Q at point B then its velocity is `30 m//s`, the velocity of Q at point B will beA. `30 ms^(-1)`B. `5 ms^(-1)`C. `20 ms^(-1)`D. `15 ms^(-1)`

Answer» Correct Answer - B
For `P, 30=15+at` or `at=15ms^(-1)`
For `Q, upsilon = 20 -at` or `upsilon = 20-15=5 ms^(-1)`


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