The problem statement, all variables and given/known data A fast-moving massive car has a head-on collision with a slow-moving light car. Which car has a greater impulse? The attempt at a solution I think more information is needed to answer the question. But could the answer be that the impulse is the same? The problem statement, all variables and given/known data A cannon with a long barrel fires a shell faster because the shell experiences a greater: a) acceleration b)impulse c)change in inertia d)none The attempt at a solution I say impulse but then i want to say none of the above. is it impulse because of the increase intime? lastone The problem statement, all variables and given/known data If a fast-moving object strikes you, you'll experience less force of impact if you can: a)shorten the time the momentum decreases. b)increase the time the momentum decreases. c)either shorten or increase the time, for the result is the same. The attempt at a solution the wording of the problem just confuses me, because at first i thought it was b but then thought a and went back to b. i just dont get the "the momentum" decreases part of the two answers.