2 kg and 4 kg are held with a compressed spring between them. If the masses are released,. If the smaller mass moves off with a velocity of 6m/s, what is the stored energy in the spring when it is compress ?
1 Answer
May 9, 2018
54 J
Explanation:
You start from the fact that the momentum is conserved. At the beginning all is stopped so Q(tot) = 0. later the smaller mass has a momentum of
also the bigger mass will have a momentum of 12 kgm/s but negative (-12 kgm/s) in the other verse, so the sum of the momentum is still zero (12-12=0). Its velocity will be
Energy: