HOOKE'S LAW
1 mark · EasyState Hooke’s law.
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The extension of a spring is directly proportional to the force applied, provided the limit of proportionality is not exceeded.
Also accept: Extension is proportional to applied force if not overstretched.
Common mistakes: Missing the condition about 'limit of proportionality'.
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Marking points
B1 · 1 mark · States correct relationship including ‘proportional’ and the condition (limit of proportionality not exceeded).
Worked solution
Hooke’s law: The extension of a spring is proportional to the force applied to it, provided it is not stretched beyond its limit of proportionality.