A truck of mass

PHYSICS · Subjective · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

A truck of mass

3.2\times10^3\,\text{kg}

, including its load, travels along a road at a constant speed of

15.0\,\text{m s}^{-1}

. Its load, of mass

800\,\text{kg}

, falls from the back of the truck, hits the ground, and stops immediately. Calculate the speed at which the truck then travels.