WAEC Physics questions: Elasticity

11 questions with answers and explanations. Tap an option to check yourself.

1. Question 1· Elasticity· WAEC

   The law stating that extension is proportional to the applied force, within the elastic limit, is

   • ABoyle's law
   • BNewton's first law
   • CHooke's law
   • DCharles' law

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2. Question 2· Elasticity· WAEC

   A spring extends 3 cm under a 6 N load. Its spring constant is

   • A2 N/m
   • B200 N/m
   • C18 N/m
   • D0.5 N/m

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3. Question 3· Elasticity· WAEC

   A spring of force constant 400 N/m is stretched 0.1 m. How much energy is stored in it?

   • A20 J
   • B4 J
   • C2 J
   • D40 J

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4. Question 4· Elasticity· WAEC

   A spring extends by 4 mm under a force of 20 N. What force produces an extension of 10 mm, within the elastic limit?

   • A25 N
   • B8 N
   • C80 N
   • D50 N

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5. Question 5· Elasticity· WAEC

   The point beyond which a stretched wire no longer returns to its original length when the load is removed is the

   • Abreaking point
   • Belastic limit
   • Czero point
   • Dneutral point

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6. Question 6· Elasticity· WAEC

   The energy stored in a spring of constant 400 N/m stretched by 0.05 m is

   • A1 J
   • B0.5 J
   • C20 J
   • D10 J

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7. Question 7· Elasticity· WAEC

   The SI unit of stress is the

   • Am
   • BN m
   • CN
   • DN m⁻²

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8. Question 8· Elasticity· WAEC

   Beyond the yield point, a stretched wire

   • Areturns to its original length
   • Bobeys Hooke's law
   • Cundergoes plastic deformation
   • Dhas no extension

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9. Question 9· Elasticity· WAEC

   A spring stretches by 2 cm under a load of 4 N. Find its extension under a load of 10 N, within the elastic limit.

   • A8 cm
   • B20 cm
   • C5 cm
   • D2.5 cm

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10. Question 10· Elasticity· WAEC

    Strain is defined as

    • Aoriginal length divided by extension
    • Bforce divided by area
    • Cforce divided by extension
    • Dextension divided by original length

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11. Question 11· Elasticity· WAEC

    A spring of force constant 200 N/m is stretched by 5 cm. What force is applied?

    • A40 N
    • B1000 N
    • C10 N
    • D4 N

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    Explanation and discussion