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IB Physics SL A 2 9 Hookes Law Restoring Force Questions

Practise IB Physics SL A.2.9 by determining the spring constant and maximum restoring force from extension and displacement.

Syllabus
First assessment 2025
Course
Physics SL
Level
SL

Exam points

  • Determine the spring constant from a mass, extension and the restoring-force relationship.
  • Calculate the maximum elastic restoring force from F = kx, including an oscillation amplitude or maximum displacement.

Learn this topic

Study A.2.9—Hooke’s law restoring force conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Physics SL A 2 9 Hookes Law Restoring Force Questions question 1

[Maximum number: 1]

A spring of negligible mass and length l0l_{0} hangs from a fixed point. When a mass m is attached to the free end of the spring, the length of the spring increases to l. The tension in the spring is equal to kΔxk \Delta x, where k is a constant and Δx\Delta x is the extension of the spring. What is k ?

A

mgl0\frac{m g}{l_{0}}

B

mgl\frac{m g}{l}

C

mgl−l0\frac{m g}{l-l_{0}}

D

mgl0−l\frac{m g}{l_{0}-l}

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