Thanks, I found your post to be very helpful :) Is 2 done correctly though?
Oh and also, I think I wrote out the question incorrectly; 1.d) should read: " How much energy does the metal ball lose as a result of the collision?"
At first I thought it would be 24J like you were saying, but is...
NOTE: I know this seems like quite a bit, but it's really not! Most of the questions involve simple 1-line equations, so please don't be discouraged by the amount of text - any assistance is greatly appreciated :)
Homework Statement
A 6kg steel ball moving at 4m/s hits a 6kg putty ball...