Recent content by iliah

Think of an inelastic collision and you will know why number three is wrong. In the last one: think of the equation to find kinetic energy. If the velocity of both objects after the collision is not zero, then what would the kinetic energy be? Is it all lost? [and I apparently posted at the...

^I'm thinking that the pin can fly off at an angle, and momentum would still be conserved. Then I need to use the x (or y) component of the final velocity of the pin... then everything would be completely complicated. I think I'll stick with the conservation of KE; things get messy with vectors...

That was the answer given in the answer booklet. This particular problem was not from Giancoli; my teacher copied it out of another book (which I can't seem to recall the name of). I am officially lost in the fog. Also, I don't see a vector problem, since both the ball and the pin travel in the...

I also cross-posted this on another website (http://www.dance.net/topic/5577521/1/Homework-Help/Physics-dilemma-Elastic-Collisions.html"), so I'll just copy & paste. I got three completely different answers while using equally legitimate formulas (formulae)? This is on elastic collisions...