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A moving body of mass m makes a head on elastic collision with another body of mass `2m` which is initially at rest. Find the fraction of kinetic energy lost by the colliding particles after collision.

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To solve the problem of finding the fraction of kinetic energy lost by the colliding particles after an elastic collision, we can follow these steps: ### Step 1: Understand the initial conditions We have two bodies: - Body 1 with mass \( m \) is moving with an initial velocity \( u_1 \). - Body 2 with mass \( 2m \) is initially at rest, so its initial velocity \( u_2 = 0 \). ### Step 2: Calculate the initial kinetic energy ...
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