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WorksheetsPhysics June 2018
Total questions: 7
Worksheet time: 4mins
What is the difference between an elastic and an inelastic deformation?
Elastics are made from rubber but inelastics are made from others. E.g. plastic
Elastically deformed objects can go back to its original state whereas vice versa.
Elastically deformed objects can't go back to its original state whereas vice versa.
Elastic deformation involves elastic rubber bands only and inelastics deformations do not.
Give the equation that relates force, extension and the spring constant of an object.
F + ke
f = ke
f = e/k
k/e = f
F = ke
What is the limit of proportionality?
There is only inversely proportionate and directly proportionate.
Too much of one factor of F = ke is not possible.
A limit to the amount of force you can apply to an object for the extension to keep on increasing proportionally.
There is a minimum force above which the graph curves, showing that extension is no longer proportional to force.
You can't like peanuts and peanut butter at the same time.
Describe an experiment you could do to investigate the relationship between force and extension.
Using a spring, utensil and bunsen burner.
Using a clamp, ruler, hooks and masses.
Using a spring, fixed ruler, clamp and masses.
Using a spring, masses, ruler and scale.
How do you find the following from a linear force-extension graph? WORK DONE
You do spring constant multiplied by extension
You do N/m.
You do half of spring constant multiplied by extension squared.
You do F/k and look at the graph.
How do you find the following from a linear force-extension graph? SPRING CONSTANT
Use the elastic potential energy, spring constant and extension formula to work it out.
Look at the graph and find the gradient of extension and force and work it out.
Use the F = ke formula and use k in the E = 1/2ke^2 formula.
Give the equation used to find the energy in an elastic object's elastic potential energy store.
F = ke
E = 1/2ke^2
e = k/F
e = F/k
>e = 2k/E
