Originally Posted By: paul
red cart 6100 kg mass v +12.84 m/s
blue cart 100 kg mass v -40 m/s

results show that the blue cart bounces off of the red cart
the red cart continues in the + direction.

red cart velocity = +11.13 m/s

blue cart velocity = +63.97 m/s


Hey Paul, there's a dirty little lie hidden in these numbers. That website is obviously operated by me to fool people about how momentum works:

red cart's momentum before:
6100kg * 12.84m/s = 78324 Ns

red cart's momentum after:
6100kg * 11.13m/s = 67893 Ns

Change in momentum:
67893Ns - 78324Ns = -10431Ns

But it was only hit by a cart with 100kg * -40m/s = -4000Ns of momentum!!!!

Impossible!

Can you explain why it gives those results? Do you accept them?