Two pucks, A and B, are on an air hockey table. Puck A is moving with an initial

Question

Two pucks, A and B, are on an air hockey table. Puck A is moving with an initial velocity of 5.5m/s Eastward and Puck B is at rest and East of Puck A. Puck A collides with Puck B. After the collision, Puck A moves at an angle of 5 degrees North of East with a velocity,vfa, and Puck B moves at an angle of 37degrees south of East with a velocity, vfb. The masses of Puck A and Puck B are 0.025kg and 0.050kg, respectively. A) Find the final speed of both pucks (vfa=3.4m/s, vbf=2.6m/s) (Remember that momentum is a vector, so you'll have to use components to find the final speed) B) The fractional change in the kinetic energy.

Explanation / Answer

A)0.036 Va cos 65 + 0.066 Vb cos 37 = 0.036 x 5.5 m/s.

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