A ball with a mass of #1 kg # and velocity of #4 m/s# collides with a second ball with a mass of #5 kg# and velocity of #- 7 m/s#. If #20%# of the kinetic energy is lost, what are the final velocities of the balls?
1 Answer
Nov 2, 2016
Explanation:
Let velocities of two balls after collision be
For ball with mass 1 kg,
Kinetic Energy before collision
Kinetic Energy before collision
Kinetic Energy before collision
Kinetic Energy after collision
Kinetic Energy after collision
So,
For ball with mass 5 kg,
Kinetic Energy before collision
Kinetic Energy before collision
Kinetic Energy before collision
Kinetic Energy after collision
Kinetic Energy after collision
So,