Question 104 of 130

Two bodies of the same mass are moving with the same speed, but in different directions in a plane. They have a completely inelastic collision and move together thereafter with a final speed which is half of their initial velocities of the two bodies (in degree) is -

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Answer: 120

Momentum conservation along x direction
$2mv\cos \theta =(2m)\dfrac{v}{2}$
$\cos \theta =\dfrac{1}{2}$
$\theta =60^{\circ}$
then angle between their initial velocities$=120^{\circ}$