Physics

Problem

A motorcycle of mass

140\,\text{kg}

increases its speed uniformly from

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

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

. Find the increase in its kinetic energy. a)

4.2\times10^{4}\,\text{J}

2.8\times10^{4}\,\text{J}

2.1\times10^{4}\,\text{J}

1.6\times10^{4}\,\text{J}