Physics

Problem

A smooth steel ball of mass

0.30\,\text{kg}

travelling at

8\,\text{m}\,\text{s}^{-1}

collides elastically with a stationary brass ball of unknown mass

M

on a horizontal table. After impact the steel ball continues in the same direction with a speed of

2\,\text{m}\,\text{s}^{-1}

. The value of

M

is: a)

0.48\,\text{kg}

0.18\,\text{kg}

0.30\,\text{kg}

0.23\,\text{kg}