JEE Main 2021 · 24 Feb · Shift 1 · Physics Q23

← JEE Main 2021 · 24 Feb · Shift 1

PhysicsInteger+4 / -1Question 23 of 90

A ball with a speed of 9 m/s collides with another identical ball at rest. After the collision, the direction of each ball makes an angle of 30° with the original direction. The ratio of velocities of the balls after collision is $x:y$ , where $x$ is _______ .

Your answer

Answer and worked solution

Official answer: 1

Momentum across the line cancels: $v_1\sin30°=v_2\sin30°$ , so the speeds are equal and $x:y=1:1$ .

Answer: 1

Topics:Elastic and inelastic collisions

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JEE Main 2021 · 24 Feb · Shift 1, Physics question 23