Elastic and Inelastic Collisions;Physics Test; True and False

A moving air track glider collides with a second stationary glider of identical mass. The first glider loses all of its kinetic energy during the collision as the second glider is set in motion with the same original speed as the first glider. Since the first glider lost all of its kinetic energy, this is a perfectly inelastic collision.

False

Momentum is conserved in an elastic collision but not in an inelastic collision.

False

Most collisions tend to be partially to completely elastic.

False

The kinetic energy of an object remains constant during an elastic collision.

False

A ball is dropped from rest and collides with the ground. The higher that the ball rises upon collision with the ground, the more elastic that the collision is.

True

Elastic collisions occur when the collision force is a non-contact force.

True

Most collisions are not inelastic because the collision forces cause energy of motion to be transformed into sound, light and thermal energy (to name a few).

True

Perfectly elastic and perfectly inelastic collisions are the two opposite extremes along a continuum; where a particular collision lies along the continuum is dependent upon the amount kinetic energy which is conserved by the two objects.

True

The collision between a tennis ball and a tennis racket tends to be more elastic in nature than a collision between a halfback and linebacker in football.

True