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Edexcel unit 2 physics help!!!!

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Igcseboy:
unit 1
sorry

astarmathsandphysics:
Does not obey hokes law cos not a striaght line.
Area under graph =energy and area <0.8
just count whole square part of which is below the graph, with each square being E=Fd=2*0.01=0.02J

Igcseboy:

--- Quote from: astarmathsandphysics on April 25, 2010, 11:07:58 am ---Does not obey hokes law cos not a striaght line.
Area under graph =energy and area <0.8
just count whole square part of which is below the graph, with each square being E=Fd=2*0.01=0.02J

--- End quote ---

how to count and get te final answer :S:S
i did not quite understand!!!

T.Q:

--- Quote from: Igcseboy on April 25, 2010, 12:03:13 pm ---how to count and get te final answer :S:S
i did not quite understand!!!

--- End quote ---

note : u have to convert the extension from cm to m

elastic strain energy = 1/2 x force x extension
                            = 0.5 x 12 x  0.1
                            = 0.6 J


this answer is approximation , because its a curve

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