A student applies different forces to a spring and measures the extension of the spring each time - OCR Gateway - GCSE Physics - Question 19 - 2023 - Paper 1
Question 19
A student applies different forces to a spring and measures the extension of the spring each time. The force–extension graph shows their results.
A, B and C are poin... show full transcript
Worked Solution & Example Answer:A student applies different forces to a spring and measures the extension of the spring each time - OCR Gateway - GCSE Physics - Question 19 - 2023 - Paper 1
Step 1
Which letter represents where the spring has elastic deformation?
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Answer
The letter A represents where the spring has elastic deformation, as this is the region where the spring returns to its original length when the force is removed.
Step 2
Which letter represents where the spring obeys Hooke’s Law?
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Answer
The letter P represents where the spring obeys Hooke's Law. This is the linear region of the graph where the force is proportional to the extension.
Step 3
Which letter represents the elastic limit of the spring?
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The letter B represents the elastic limit of the spring. Beyond this point, the spring will not return to its original shape.
Step 4
Which letter represents where the graph is non-linear?
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The letter Q represents where the graph is non-linear. This indicates that the spring has reached a permanent deformation.
Step 5
State the minimum number of forces that need to be applied to the spring in order to stretch it.
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At least one force must be applied to stretch the spring.
Step 6
Calculate the force exerted by the spring when it is extended by 0.15 m.
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Answer
Using the formula:
extForce=extSpringConstantimesextExtension
we have:
extForce=28extN/mimes0.15extm=4.2extN.
Step 7
Calculate the energy transferred when the spring is extended by 0.15 m.
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The energy transferred can be calculated using the formula:
