<p>A <span style=\"color: #ff0000;\">587</span>-kg car stopped at an intersectio

Question

<p>A <span>587</span>-kg car stopped at an intersection is rear-ended by a <span>1660</span>-kg truck moving with a speed of <span>15.0</span> m/s. If the car was in neutral and its brakes were off, so that the collision is approximately elastic, find the final speed of both vehicles after the collision.</p>
<p>___ m/s (car)</p>
<p>___ m/s (truck)</p>

Explanation / Answer

Initial Momentum = Final momentum 1660 * 15 = 587 * x + 1660 * (x-15) [if relative velocity is same in elastic collision] x = 22.16 m/s x - 15 = 22.16 - 15 = 7.16 m /s car -> 22.16 truck -> 7.16, both in forward direction

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