A ball with a mass of #4 kg # and velocity of #1 m/s# collides with a second ball with a mass of #2 kg# and velocity of #- 5 m/s#. If #75%# of the kinetic energy is lost, what are the final velocities of the balls?
1 Answer
The final velocities are first ball
Explanation:
By the Law of conservation of momentum
The initial kinetic energy is
The final kinetic energy is
And
so,
Solving for
Solving this quadratic equation
And
The final speeds are