Physics Coursework
An Investigation into the relationship between the forces applied to a length of wire and its extension.
Aim: - To investigate the relationship between the extension [e] of a length of copper wire and the force [f] applied to the wire, to do this I intend to use Hooks law the linear modulus is known as stress/strain, also known as Young's modulus [E]. I hypothesise tat as we increase the amount of force applied to the wire, so its extension will increase. As this was what I found in previous experiments involving Hooks law.
Diagram: -
I will use Young's modulus as it links the two factors that we wish to investigate in that to find a value for Youngs modulus you need to find two values, stress and strain
E = Stress where; - stress = Force [f] also;- Strain = extension [e]
Strain Cross sectional area [a] original length [l]
As we can see from above stress is calculated using force and cross sectional area there for involving force as we require, this will be my input variable and will be the value subject to change. Strain involves extension and original length therefore also bringing in extension, as I required this would be the variable that I will measure.
The other variables involved, original length and cross sectional area will have to be maintained as constants as these are active variables I young's modulus.
An Investigation into the relationship between the forces applied to a length of wire and its extension.
Aim: - To investigate the relationship between the extension [e] of a length of copper wire and the force [f] applied to the wire, to do this I intend to use Hooks law the linear modulus is known as stress/strain, also known as Young's modulus [E]. I hypothesise tat as we increase the amount of force applied to the wire, so its extension will increase. As this was what I found in previous experiments involving Hooks law.
Diagram: -
I will use Young's modulus as it links the two factors that we wish to investigate in that to find a value for Youngs modulus you need to find two values, stress and strain
E = Stress where; - stress = Force [f] also;- Strain = extension [e]
Strain Cross sectional area [a] original length [l]
As we can see from above stress is calculated using force and cross sectional area there for involving force as we require, this will be my input variable and will be the value subject to change. Strain involves extension and original length therefore also bringing in extension, as I required this would be the variable that I will measure.
The other variables involved, original length and cross sectional area will have to be maintained as constants as these are active variables I young's modulus.