Answer:
The final speed of puck 1 is 0.739 m/s towards west and puck 2 is 2.02 m/s towards east .
Explanation:
Let us consider east as positive direction and west as negative direction .
Given
mass of puck 1 ,
mass of puck 2 ,
initial speed of puck 1 ,
initial speed of puck 2 ,
Final speed of puck 1 and puck 2 be respectively
Apply conservation of linear momentum
=>
=> -----(A)
Since collision is perfectly elastic , coefficient restitution e=1
=> ------(B)
From equation (A) and (B)
and
Thus the final speed of puck 1 is 0.739 m/s towards west and puck 2 is 2.02 m/s towards east .