0) Find The total kinetic energy increase in the process 15. A calcium nucleus (A=20), mass m, travels with velocity v0 in the Lab. It decays into a sulphur nucleus [A=16), mass 4/5m, and an a-particle (A=4), mass 1/5m. Energy AT is released as KE in the calcium rest frame (CM]. A counter in the Lab detects the sulphur nucleus at 90" to the line of travel. What is the speed and angle of the a-particle in the Lab