Physics

Problem

During a crash test, a

900\,\text{kg}

car comes to rest after its crumple zone absorbs

150\,\text{kJ}

of energy. Estimate the maximum speed (in

\text{km/h}

) at which the car could hit the wall without exceeding this limit. a)

60\,\text{km/h}

45\,\text{km/h}

65\,\text{km/h}

70\,\text{km/h}