A620-g object traveling at 2.1 m/s collides head-on with a 320-g object traveling in the opposite direction at 3.8 m/s. if the collision is perfectly elastic, what is the change in the kinetic energy of the 620-g object?

0.22788 J

Explanation:

= Mass of first object= 0.62 kg

= Mass of second object = 0.32 kg

= Initial Velocity of first object = 2.1 m/s

= Initial Velocity of second object = -3.8 m/s

For perfectly elastic collision

Change in kinetic energy

Change in kinetic energy of the 620g object is 0.22788 J