What makes some collisions elastic and others inelastic? a. if there is energy lost in the collision to sound, heat, etc., the collision is inelastic. b. if there is no loss of kinetic energy in the collision, it is inelastic. c. if the collision involves bouncing, it is elastic. d. if the collision involves sticking together, it is elastic.

The correct choice is (A)

If there is energy lost in the collision to sound, heat, etc., the collision is inelastic.

A perfectly elastic collision is the collision in which there is no loss of kinetic energy whereas an inelastic collision is one in which part of the kinetic energy is changed to some other form of energy in the collision. Since option A shows the same concept so it is the correct choice.

jupiter is the largest planet in our solar system, having a mass and radius that are respectively, 318 and 11.2 times that of earth. suppose that an object falls from rest near the surface of each planet and that the acceleration due to gravity remains constant during the fall. each object falls the same distance before striking the ground. determine the ratio of the time of fall on jupiter to that on earth.