ProblemSet 5: Problem 3.Problem:Two identical hockey pucks moving with initial speedsvA=65vandvB=vcollide asshown. The coefficient of restitution of the pucks ise. You can ignore the friction of the surface onwhich the pucks move.(a) Determine the velocities of the pucks after impact.(b) Experimentation shows that Puck A is at rest after the impact whenθ= 80.13o, which correspondstocosθ= 6/35. Using your result from Part (a), determine the value ofe.Solution: (a)The line of impact for the hockey pucks is thexaxis. So, there is no need to distinguishbetweenntandxycoordinates.Tangential-Velocity Invariance.For pucks A and B, we have the following.vAy=vIAyandvBy=vIByThe initial velocities of the pucks are such thatvAy= 0andvBy=vsinθ.Therefore, the tangentialvelocity components after the impact are
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