Find their velocities after the collision

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SUMMARY

The discussion focuses on calculating the velocities of two balls after a head-on elastic collision. The first ball has a mass of 0.198 kg and an initial velocity of 1.47 m/s, while the second ball has a mass of 0.309 kg and an initial velocity of -0.401 m/s. Using the principles of conservation of momentum and kinetic energy, the final velocities after the collision can be determined. Additionally, the velocity of the center of mass before and after the collision is calculated, confirming that it remains constant due to the conservation laws in elastic collisions.

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  • Basic principles of center of mass calculations
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Student91
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A ball of mass 0.198 kg has a velocity of 1.47 i m/s; a ball of mass 0.309 kg has a velocity of -0.401 i m/s.They meet in a head-on elastic collision.

a) Find their velocities after the collision

b) Find the velocity of their center of mass before and after collision
 
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Since it's an ellastic collision, momentum is conserved. a) can be found with conservation of momentum.
 

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