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Momentum question

  1. Nov 18, 2004 #1
    I am desparate and only have 1 submission left on this question. Can someone help me with the answer please?
    8. [CJ5 7.P.032.] The drawing shows a collision between two pucks on an air-hockey table. Puck A has a mass of 0.020 kg and is moving along the x axis with a velocity of +5.5 m/s. It makes a collision with puck B, which has a mass of 0.040 kg and is initially at rest. After the collision, the two pucks fly apart with the angles shown in the drawing.

    Puck a goes into quadrant 1 at an angle of 65.
    Puck b goes into quadrant 4 at an angle of 37.

    Find the final speed of
    (a) puck A and
    (b) puck B.
  2. jcsd
  3. Nov 18, 2004 #2

    Andrew Mason

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    Since there is no net momentum in the direction of the y axis:
    [tex]m_{Af} v_{Af}sin\alpha + m_{Bf}v_{Bf}sin\beta[/tex] = 0

    Since initial x momentum is conserved:
    [tex]m_{Af} v_{Af}cos\alpha + m_{Bf}v_{Bf}cos\beta = m_{Ai} v_{Ai}[/tex]

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