Open the simulation, which shows a large green and a small blue puck.

The green circular puck will collide with the blue circular puck initially at rest. Values are given for

	the x and y velocity components
	the elasticity of the collision
	the ratio of the mass of the blue puck and the green puck

If you need to review the conservation principles for two-particle collisions, consult the Advisor.

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Question 1
The green puck travels at 4.0m/s in the positive x-direction and has a head-on, totally inelastic collision with the blue puck (they stick together). The mass of the green puck is twice that of the blue puck. Predict the speed of the two pucks after the collision. Is kinetic energy conserved? Support your answer. After your calculations, run the simulation to check your prediction.

Question 2

Open the simulation, which has an elasticity setting of 1.00.

The green puck's initial speed is 4.0m/s in the positive x-direction. The mass of the green puck is twice that of the blue puck. Predict the speed of both pucks after the collision. After your calculations, run the simulation to check your prediction.

Question 3

Open the simulation, in which the green puck is repositioned and the blue puck is resized.

The green puck travels at 4.0m/s in the positive x-direction and has an indirect elastic collision with the blue puck. The masses of the pucks are equal. Run the simulation and observe the x- and y-velocity components of the green puck. Then predict the x- and y-components of velocity of the blue puck. After your calculations, click BLUE SPEEDS and rerun the simulation to check your predictions.