Physics

Problem

A car has kinetic energy

2.5\times10^{5}\,\text{J}

when its mass is

1250\,\text{kg}

. Determine its speed in

\text{km\!/h}

. a)

51\,\text{km\!/h}

36\,\text{km\!/h}

72\,\text{km\!/h}

144\,\text{km\!/h}