Physics

Problem

A steel ball of mass

1\,\text{kg}

moving at

10\,\text{m/s}

has the same kinetic energy as an aluminium block moving at

5\,\text{m/s}

. Find the mass of the aluminium block. a)

8\,\text{kg}

4\,\text{kg}

20\,\text{kg}

2\,\text{kg}