# The effect of applied force on the extension of a spring, using Hooke's Law to predict my results.

Physics Coursework - Springs

Physics Coursework – Forces and Extension

Plan

Introduction

I will be studying the effect of applied force on the extension of a spring, using Hooke’s Law to predict my results.

I will investigate how much a single spring, two springs in series, and two springs in parallel extend by when I apply measured forces to them.

Diagram

This is how I set up my apparatus to investigate the springs:

Method

This is how I conducted the experiment:

I set up the apparatus as shown in the diagram. Using the pointer, I measured the extension of the spring from 0N to 3.5N, by adding 1/2 N weights. I then repeated the experiment, using two springs placed side-by-side (parallel), then repeated it again using two springs attached to each other (series).

Safety

The equipment used in this experiment is all safe, but nevertheless, the weights should not be dropped, and the springs must be handled with care.

Prediction/Theory

Hooke’s Law states that the extension of a spring is directly proportional to the force applied. I expect this to be shown in my results and graphs.

A force (F) on a spring is linearly dependent on its extension, Δx. Hooke’s law states that to extend a spring by an amount Δx, one needs a force, which is determined by the equation F = kΔx. The spring constant, k, is a quality particular to each spring, usually determined by its thickness and the malleability of the metal (the stretchiness of the spring).

In this experiment, the force ...