Momentum and CollisionHard

Question

Two particles A and B of masses 2 m and m respectively are moving with same velocity v as shown in figure. At instant shown in figure, choose CORRECT option from the following :-

Options

A.Total kinetic energy of system (A + B) in the frame of centre of mass is 3mv²/2

B.Linear momentum of A in the frame of B has magnitude mv

C.Angular momentum of A in the frame of B has magnitude 2mvl

D.Angular velocity of line joining A and B has magnitude zero.

Solution

vb_cm = v
k_sys = (2m)v²_Ac + mv²_Bc = 0
P = 2mv_AB = 0
L = l(2m)v_AB = 0

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