Physics

Problem

0.020\,\text{kg}

bullet is fired horizontally at

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

from a

2.0\,\text{kg}

rifle that is free to slide without friction on a horizontal surface. What is the speed of the rifle immediately after the bullet leaves the barrel? a)

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

opposite the bullet’s motion b)

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

in the same direction as the bullet c)

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

opposite the bullet’s motion d)

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

opposite the bullet’s motion

Browse the problem library