On a frictionless air hockey table, a puck of mass 5.0 kg moving at 2:0m=s approaches an identical puck that is stationary. After collision, the �rst puck moves at 30 degrees� above the original line of motion; the second puck moves 60 degrees� below.

Question

(a) What are the speeds of the puck after collision?
(b) Was the collision elastic?

Answer 1

bn,m,

Answer 2

3.8