Elastic Collision Problem. Help

[blue_bee29]

Homework Statement

2 objects A & B rolling along a frictionless horizontal surface. object A of mass 1 kg is initially moving to the left @ 2 m/s while object B of mass 0.5 kg moves to the right @ 1 m/s. What is the velocity of each object after the collision if the collision is elastic?

Homework Equations

[m][/A][v][/A]+[m][/B][V]=[m][/A][v][/A]'+[m][V]'[SUBm][/SUB1]

The Attempt at a Solution

 

[rl.bhat]

Apply the law of conservation of momentum and law of conservation of energy. Take care that the two initial velocities are not in the same direction.

 

[avenkat0]

Since there is no net external force on the system, the momentum is conserved... and since it's also a elastic collision energy is also conserved.

The easiest way to go about this problem is to use conservation of linear momentum

another way of going about this is that since energy is also conserved.

Let me know how it goes...

 

[blue_bee29]

hey, thanks guys. Got the answer. phew..!