A steel ball of mass moving at has the same kinetic energy as an aluminium block moving at

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

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}

(b)

4\,\text{kg}

(c)

20\,\text{kg}

(d)

2\,\text{kg}