Question

When a metal spring is elongated within its elastic limit

• A. work is done by the spring
• B. potential energy is stored in it
• C. its potential energy is lost
• D. its total energy remains constant
• E. its kinetic energy is increased

Answer 1

The Correct Option is A

When a metal spring is elongated within its elastic limit, the spring stores potential energy. However, the nature of the work done depends on whether the spring is being stretched or compressed. 

When the spring is stretched, work is done to deform it, and potential energy is stored in the spring. This energy is stored in the form of elastic potential energy. If the spring is subsequently allowed to return to its original length, the stored potential energy is converted back into work. This means that, during the stretching process, the spring is doing work to resist the deformation. Therefore, the correct statement is that work is done by the spring when it is elongated within its elastic limit, as the spring resists the applied force while storing potential energy.

Correct Answer:

Correct Answer: (A) Work is done by the spring