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Hunterbender
#4
Jan11-09, 08:40 PM
P: 54
Some old AP Mech problems

Quote Quote by nns91 View Post
For b, it will be something like m(cube)*v(cube,i) = m(cube)v(cube,f) + m(ball)v(ball)

but I don't know the final velocity of the cube which is after collision, how can I use conservation of momentum ??

Can I use conservation of Energy by using: mgh=(1/2) mv^2 ?
Part D ask you to solve for the energy lost. So that's a hint that energy isn't conserve. So prob don't want to use energy conservation (or else they won't have part d)

And I just realize that it said cube and ball. SO I guess you need to take into consideration of rotation energy? O.o?