Physics

Problem

2000\,\text{kg}

truck travels on a level straight road at a constant speed of

72\,\text{km h}^{-1}

. The rolling resistance opposing its motion is

1.5\,\text{kN}

. Calculate the horizontal driving force produced by the engine at this speed. a)

0.5\,\text{kN}

9.8\,\text{kN}

1.5\,\text{kN}

3.0\,\text{kN}