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CAIE A-Level Physics AS 6.1.3 Hookes Law Questions

Apply Hooke’s law F = kx to relate force, extension and spring constant within the limit of proportionality.

Syllabus
2028–2030
Course
Physics 9702
Level
AS

Exam points

  • Apply Hooke’s law F = kx to relate force, extension and spring constant within the limit of proportionality.

CAIE A-Level Physics AS 6.1.3 Hookes Law Questions question 1

[Maximum number: 1]

A lamp is suspended in equilibrium from a fixed support by three long identical wires.

Figure for Question CAIE A-Level Physics AS 6.1.3 Hookes Law Questions question 1 — CAIE A-Level Physics AS

The weight of the lamp causes each wire to have an extension of 0.40 cm . The height h of the lamp above the floor is measured.

The middle wire suddenly breaks and the lamp falls a small distance as the extensions of the remaining two wires increase. The wires obey Hooke's law.

When the lamp is in equilibrium, the height h of the lamp above the floor is measured again.
What is the difference between the two values of h ?

A

0.20 cm0.20 \mathrm{~cm}

B

0.27 cm0.27 \mathrm{~cm}

C

0.40 cm0.40 \mathrm{~cm}

D

0.60 cm0.60 \mathrm{~cm}

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