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Answer the following question. on momentum Please explain if anwer will be 0 and why

Answer the following question. on momentum
Please explain if anwer will be 0 and why
 

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Grade:9

1 Answers

Khimraj
3007 Points
6 years ago
As there is absence of external force so conservation of linear momentum will be applicable.
let we assume leftward velocity in positive direction and the velocity of obejects afer stick together is V. Then
(2m)(3v) +(m)(-2v) = (2m+m)V
So V = 4v/3
So total momentum is (3m)(4v/3) = 4mv.
And total kinetic energy = 0.5(3m)(4v/3)2 = (8/3)mv2.
Hope it clears if still you have doubt you can ask me.
If you like answer then please approve it.

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