Recent content by A Physics Student

Aha, now it makes much more sense, and I see why the assumption in the first part was wrong. Thank you all for your helpful replies!

I see, the assumption about the equal but opposite momenta was incorrect... That should be true for only perfectly inelastic collisions with equal masses. So, does that mean the answer from the second method, 6m/s, is correct? I found that if I plugged that number into the Conservation of...

Homework Statement There is a 4 kg mass that has a speed of 6 m/sec on a horizontal frictionless surface. The mass collides head-on and elastically with an identical 4 kg mass initially at rest. The final speed of the first 4 kg mass is: (a) 0 m/s (b) 2 m/s (c) 3 m/s (d) 6 m/s Homework...