Question

29. A blob of mud moving with a
velocity (v) collides with a wall. If the
collision be perfectly inelastic, the
change in the momentum of the blob will be:
(a) mv
(b) 0
(c) - mv
(d) 2mv​

Answer 1

Explanation:

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11th

Physics

Systems of Particles and Rotational Motion

Linear Momentum of a System of Particles

If a body of mass M collide...

PHYSICS

If a body of mass M collides against a wall with velocity V and rebounds with the same speed, then its change of momentum will be

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ANSWER

Initial velocity of body before collision u=−V

where minus sign indicates the body moves towards the wall.

Initial momentum of the body Pi =Mu=−MV

Final velocity of body after collision v=V

where positive sign indicates the body moves away from the wall.

Final momentum of the body P f =Mv=MVChange in momentum ΔP=P f−P =MV−(−MV)=2MV