A 0.311 kg tennis racket moving 30.3 m/s east makes an elastic collision
with a 0.0570 kg ball moving 19.2 m/s
west. Find the velocity of the tennis
ball after the collision.
(Unit = m/s)
Domombor riatic
jftie

Which of the following best describes internal energy? a. the difference between the kinetic and potential energies of the particles in a system b. the sum of the kinetic and potential energies of the particles in a system c. the sum of the kinetic and thermal energies of the particles in a system d. the difference between the kinetic and thermal energies of the particles in a system