AQA AS Physics Unit 2 June 2013 Question 4

Hook's law and calculating area under the graph. this is quite a difficult question in truth and I would advise while going through this video clip to either have the paper open online in another tab or to have the actual paper printed out in front of you as one of the question you need to count some squares... I do promise you this question is a lot more challenging than I am making it sound..

Enjoy!!