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JEE Main 20206 SeptemberMorning Shift

Exam: JEE Main
Year: 2020
Date: 6 September
Shift: Morning Shift
Subject: Physics
Chapter: Center of Mass, Momentum and Collision

JEE Main 2020 · 6 September · Morning Shift · Physics · Center of Mass, Momentum and Collision

Two bodies of the same mass are moving with the same speed, but in...

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 -

Two bodies of the same mass are moving with the same speed, but in different directions in a plane. They have a

Correct answer

120

Step-by-step solution

Two bodies of the same mass are moving with the same speed, but in different directions in a plane. They have a

Momentum conservation along x direction

$2mvcos\theta = ( 2m ) \dfrac{v}{2}$

$cos\theta = \dfrac{1}{2}$

$\theta = 60 °$

then angle between their initial velocities

= 120 °

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