Question

Fractional lost in kinetic energy elastic collision

Answer 1

The problem statement, all variables and given/known data[/b] A neutron (mass 1 u) experiences an elastic head-on collision with a gold nucleus (mass 197 u) that is originally at rest. What percentage of its original kinetic energy does the moving particle lose? 2. Relevant equations Elastic Collision: V1f= (m1-m2)/(m1+m2) * V1i K.E. = 1/2 m*v^2 3. The attempt at a solution The final Velocity of the moving particle is (1u-197u/198u) *V1i But I don't know where to go from here in terms of solving the percentage of Kinetic Energy lost.