Which is always true in a closed system?(1 point) Responses Acceleration is not constant. Acceleration is not constant. Mass is not conserved. Mass is not conserved. Velocity is constant. Velocity is constant. Momentum is conserved. Momentum is conserved.

Answer 1

In a closed system, the statement that is always true is: Momentum is conserved.

This is a fundamental principle of physics that holds true in the absence of external forces.