A body A of mass 2 kg is projected upward from the surface of the ground at t = 0 with a…
Physics · JEE Advanced · NTA Exams — Laws of Motion
A body A of mass 2 kg is projected upward from the surface of the ground at t = 0 with a velocity of 20 m/s. One second after a body B, also of mass 2 kg is dropped from a height of 20 m. If they collide elastically, then their velocities just after collision are :
- vA = 5 m/s downward, vB = 5 m/s upward
- vA = 10 m/s downward, vB = 5 m/s upward
- vA = 10 m/s upward, vB = 10 m/s downward
- both move downward with velocity 5 m/s
Answer
(A) v A = 5 m/s downward, v B = 5 m/s upward
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