Homework Help Forum: Physics

Posted by John on Monday, November 2, 2009 at 4:04pm.

Two pucks collide on a level air-hockey table. Puck A has a mass of 0.0250 kg and is moving initially due eastward at a speed of 5.50m/s. Puck B has a mass of 0.0500kg and is initially at rest. Right after collision, puck A is moving in a direction of 65 degrees north of east; and puck B is moving in a direction of 37 degress south of east. Find the speed of each puck right after the collision.

• Physics - bobpursley, Monday, November 2, 2009 at 4:10pm

  Well, you know momentum is conserved in NS, and EW directions. So write the momentum conservation equations in NS, and EW directions. And, you have KE conservation.Three equations, three unknowns (velocity A, velocity B). Start with the NS equation.

  
  

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