In a two-body collision,if the momentum of the system is conserved,then which of the following best describes the kinetic energy after the collision?
A)must be less
B)must also be conserved
C)may also be conserved
D)is doubled in value

Question

Quizplus · Accepted Answer

The conservation of momentum only guarantees that the total momentum of the system will remain constant, but it does not guarantee that the kinetic energy will be conserved. In fact, in most cases, some of the initial kinetic energy is converted to other forms of energy such as heat, sound, or deformation energy during the collision. However, it is possible for the kinetic energy to be conserved if the collision is perfectly elastic, meaning that no energy is lost to other forms. Therefore, the kinetic energy may also be conserved after the collision, but it is not guaranteed.

In a Two-Body Collision,if the Momentum of the System Is