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Class 9 Physics · Chapter 6 · Test 1

Hooke's Law and Pressure

36 MCQs

MCQs

36 questions · 30 min · 36 marks

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Sample questions

The first 5 of 36. Try each one, then tap to see the answer.

  1. Question 1

    A force that changes the size or shape of an object is called:

    • AGravitational force
    • BDeforming force
    • CBuoyant force
    • DMagnetic force
    Show answer

    Answer: B

    A deforming force changes the size or shape of an object.

  2. Question 2

    A material is elastic if it:

    • AAlways breaks under force
    • BReturns to its original shape after the deforming force is removed
    • CKeeps every deformation permanently
    • DCannot change its shape
    Show answer

    Answer: B

    An elastic material regains its original shape and size after the deforming force is removed, within its elastic limit.

  3. Question 3

    Which material is given as an example of an inelastic material in the chapter?

    • ASteel spring
    • BRubber band
    • CPlasticine
    • DHelical spring
    Show answer

    Answer: C

    The chapter identifies plasticine and clay dough as materials that do not return to their original shape.

  4. Question 4

    Within the elastic limit, the extension of a spring is directly proportional to the:

    • AMass of the spring only
    • BApplied force
    • COriginal colour of the spring
    • DSurface area of the spring
    Show answer

    Answer: B

    Hooke's law states that extension is directly proportional to the applied force within the elastic limit.

  5. Question 5

    Which equation gives the spring constant?

    • Ak = x/F
    • Bk = Fx
    • Ck = F/x
    • Dk = F + x
    Show answer

    Answer: C

    Spring constant is calculated by dividing the applied force by the extension: k = F/x.

More tests in Mechanical Properties of Matter

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