When a spring is placed in a motionless elevator, it will remain in its original position and will not expand or contract. This is because there is no external force acting on the spring to change its shape or size.
Since the elevator is not moving, there is no change in the spring's potential energy or kinetic energy. The spring will remain in a state of equilibrium, with its potential energy stored in its compressed or stretched state.
The weight of the elevator will have no effect on the spring's behavior, as long as the elevator remains motionless. The spring will only respond to external forces, such as gravity or a person pushing or pulling on it.
Yes, the spring can still be compressed or stretched by applying an external force, such as a person pushing or pulling on it. However, the spring will return to its original position once the external force is removed, as there is no force acting on it to maintain the compression or stretch.
The air pressure inside the elevator will have no direct effect on the spring's behavior. However, changes in air pressure can indirectly affect the spring, as it may cause the elevator to move and create external forces on the spring. In a motionless elevator, the air pressure will not impact the spring's behavior.