Which is always true in a closed system?(1 point)
Responses
Mass is not conserved.
Mass is not conserved.
Velocity is constant.
Velocity is constant.
Momentum is conserved.
Momentum is conserved.
Acceleration is not constant.
Acceleration is not constant.
Momentum is conserved.
The correct response in a closed system is:
Momentum is conserved.
To determine which statement is always true in a closed system, we need to understand what a closed system is.
A closed system refers to a system in which there is no exchange of matter or energy with its surroundings. In other words, no mass or energy enters or leaves the system.
Now, let's evaluate each statement:
1. Mass is not conserved: This statement is incorrect. In a closed system, mass is conserved. This principle is known as the conservation of mass, which states that the total mass of a closed system remains constant over time unless there is an input or output of mass.
2. Velocity is constant: This statement is not always true in a closed system. Velocity can change in a closed system depending on the forces acting upon the objects within the system.
3. Momentum is conserved: This statement is true. In a closed system, the total momentum remains constant as long as there are no external forces acting on the system. This is known as the conservation of momentum.
4. Acceleration is not constant: This statement is not always true in a closed system. Acceleration can be constant or change depending on the forces acting upon the objects within the system.
Based on the explanations above, the statement that is always true in a closed system is: Momentum is conserved.