A particle of mass m and velocity v collides elastically and obliquely with a stationary particle of mass m. Calculate the angle (in degrees) between the velocity vectors of the two particles after the collision.

Engineering

Physics

Momentum and Energy Conservation for System of Particles

Question

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In an elastic oblique collision between two identical masses (m), with one initially stationary, momentum and kinetic energy are conserved. Let initial velocity be $\vec{v}$ . After collision, velocities are $\vec{v_{1}}$ and $\vec{v_{2}}$ . Conservation laws lead to the result that the angle between the final velocity vectors is always 90°.

Final Answer: $90 °$