A Level Physics Practice Exam

What does the term 'compression' refer to in the context of a spring?

1. Lengthening of the spring

2. Permanent extension of the spring

3. Shortening of the spring

4. Bending of the spring

The correct answer is: Shortening of the spring

In the context of a spring, the term 'compression' specifically refers to the shortening of the spring when a force is applied that pushes the coils closer together. When a compressive force is exerted on a spring, it causes the spring to reduce in length from its natural (rest) position. This is a fundamental property of springs, which respond to applied forces by either stretching (extension) or compressing depending on the direction of the force. Understanding compression is crucial in applications involving springs, such as in mechanical systems where springs are used to absorb shock, maintain tension, or apply force. The behavior of springs under compression is also described by Hooke’s Law, which states that the force exerted by the spring is proportional to the distance it is compressed from its equilibrium position. Thus, the correct interpretation of 'compression' aligns with the concept of shortening the spring due to an applied force.