Three identical round pucks A, B, and C are placed on frictionless surface as sh

Question

Three identical round pucks A, B, and C are placed on frictionless surface as shown. The

puck A is shot with initial velocity V0 along the symmetry line. The pucks B and C are

initially touching each other. The pucks undergo elastic collision. Find the velocity of the

puck A after the collision.

http://snag.gy/SWNyf.jpg

The diagram is above, listed as Problem 2.

I have 4 other similar questions you can answer for Chegg points named "Simple Physics Question A"... "Simple Physics Question E."

Thanks for your time, and I look for complete, detailed answers with originality. :)

Explanation / Answer

mA = mB = mC = m


let v velociy of the puck A after the collision.


V1 = (m1-m2/m1+m2)*vo

here m1 = mA = m

m2 = (mB+mC) = 2m

v1 = (m-2*m)*vo/(m+2m) = (-1/3)*vo

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