Hockey puck B rests on a smooth ice surface and is struck by a second puck A, which has the same mass. Puck A is initially traveling at 14.6 and is deflected 28.0 from its initial direction. Assume that the collision is perfectly elastic.

a)Find the final speed of the puck B after the collision.
b)Find the final speed of the puck A after the collision.
c)Find the direction of B's velocity after the collision.

Explanation:

Puck A's initial speed is and move in a direction after the collision.

# since there's no external force on the system(

#The collision equation can be written as;

The kinetic energies before and after the collision are expressed as:

Let +x along A's initial direction and +y along A's final direction makes the angle

#Substitute in :

Hence, the the speed of puck A after the collision is 12.891  m/s

#. The velocity of A after the collision is;

Substitute into :

This is the velocity of puck B after the collision, it's speed is:

The velocity of puck B after the collision is 6.8544 m/s

c. The direction of puck B after the collision is:

Hence, the direction of B's velocity after the collision is 62°

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