Final answer:
The incorrect statement regarding an elastic collision is that objects stick together after the collision. This is a characteristic of an inelastic collision, not an elastic one, where both momentum and kinetic energy are conserved, and objects bounce off each other.
Step-by-step explanation:
The statement that is incorrect regarding an elastic collision is D) Objects stick together after collision. In an elastic collision, two important physical quantities are conserved: momentum and kinetic energy. Statement D describes a characteristic of an inelastic collision, where the objects involved do not separate after the collision, potentially moving with a common velocity, and kinetic energy is not conserved.
In summary, for an elastic collision:
- Momentum is conserved, which complies with the conservation of momentum law in physics.
- Kinetic energy is conserved, meaning the total kinetic energy of the system before collision is equal to the total kinetic energy after collision.
- There is no loss of internal kinetic energy, although some energy may transform into sound or light during the impact.
- Objects do not stick together after collision; they bounce off each other.