A 20 kg car moving at a speed of 0.5 m/s to the right collides head on with a 35 kg car at rest. After collision, the 35kg car is observed to move to the right with a speed of 0.2 m/s. Find coefficient of restitution 'e' and fill 100e in the answer.

Engineering

Physics

Collision

Question

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20 × 0.5 = 35 × 0.2 + 20 × v

10 – 7 = 20 v

$v = + \frac{3}{20} m / s = 0 .15 m / s$

$e = \frac{0.2 - (0.15)}{0.5 - 0} = \frac{1}{10}$

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