Question

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 be
A. 30 m/s
B. 5 m/s
C. 10 m/s
D. 15 m/s

Answer 1

Correct Answer - B
`v_("rel") = at`
For P: `30 = 15 + at`
For Q: `y = 20 - at`