Question

A marble with a mass of 0.5 kg is moving to the right at 1.25 m/s and a second marble with a mass of 0.35 kg is moving to the left at 2.15 m/s. If they collide head on and the collision is elastic find the final velocities of the two marbles

Answer 1

write the conservation of momentum. Find v2' in terms of m1, m2, and v1'

then write the conservation of energy. for v2' put in what you have from the first equation.

A bit of algebra is required.

Answer 2

I get V'2 = 1.09 m/s and V'1 = 1.99 m/s

Does anyone else concur?