Name: Hooke’s Law and Young’s Modulus
Uploaded: 2019-07-19
Duration: 4 min 44 s
Description: If you pull a spring, it will elongate. And its elongation can be described under the Hooke’s Law. What is this law all about? Watch this video to find out.

Question

Describe how you would carry out an experiment to investigate the relationship between the load on a spring and the extension of that spring. Draw a diagram of your experimental arrangement.

Accepted Answer

The investigation can be done using a rigid clamp, spring, and weights. The spring is hung from a rigid clamp so that its top end is fixed. Weights are hung on the end of the spring (these are referred to as load). As the load is increased, the spring stretches, and its length increases.

When the load is increased in regular steps, the length of the spring also increases and if the load is removed then the spring will come back to its original length however, if the load is increased too far, the spring becomes permanently stretched and will not return to its original length.

This diagram represents how the length of the spring changes with the increase in load.

As the force stretching the spring increases, the spring gets longer. It is important to consider the increase in the length of the spring. This quality is known as extension.

Length of stretched spring $=$ Original length $+$ Extension

This means that, if you double the load that is stretching a spring, the spring will not become twice as long. It is the extension that is doubled. We can get the extension of the spring by simply subtracting the original length of the spring from the length of stretched spring.

Describe how you would carry out an experiment to investigate the relationship between the load on a spring and the extension of that spring. Draw a diagram of your experimental arrangement.

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