Question

dentify the conditions for an elastic collision in a closed system. Check all that apply.

Energy is conserved.
Velocities may change.
Momentum is conserved.
Kinetic energy is conserved.
Objects stick together after the elastic collision.
One object may be stationary before the elastic collision.

Answer 1

Select: Energy is conserved; Velocities may change; Momentum is conserved; Kinetic energy is conserved; One object may be stationary before the elastic collision.

Do not select: Objects stick together after the elastic collision.

Notes:
- An elastic collision conserves momentum and kinetic energy (so total energy is conserved as well).
- Individual object velocities can and usually do change.
- One object can be initially at rest — that's allowed.
- Objects sticking together describes a completely inelastic collision, not an elastic one.