A particle of mass m moves with velocity v 0 = 20 m/sec towards a large wall that is moving with velocity v = 5 m/sec. towards the particle as shown . If the particle collides with the wall elastically, the speed of the particle just after the collision is :
Text Solution
Verified by ExpertsThe correct answer is:
A
Vel. of Sep = Vel of approach ( ∴ elastic)
∴ 20 + 5 = V – 5 ⇒ V = 30 m/s
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