Consider the net work required to stop a moving object. a) What is the net work, in joules, required to stop a crate of mass 72 [tex]\mathrm{kg}[/tex] that is moving at a speed of [tex]1.89 \mathrm{~m} / \mathrm{s}[/tex] ? b) What is the net work, in joules, required to stop a bullet of mass [tex]6.1 \mathrm{~g}[/tex] that is moving at a speed of [tex]470 \mathrm{~m} / \mathrm{s}[/tex] ?