Physics 9702 · AS & A Level · Physical quantities

Physical quantities — practice question

A wire begins with an unstretched length of $2.00\,\text{m}$. It is subjected to a stress of $1.6 \times 10^5\,\text{Pa}$, after which its length becomes $2.10\,\text{m}$. Assume the wire follows Hooke’s law. Determine the Young modulus of the wire.

  • A$8.0 \times 10^3\,\text{Pa}$
  • B$7.8 \times 10^4\,\text{Pa}$
  • C$1.5 \times 10^5\,\text{Pa}$
  • D$3.2 \times 10^6\,\text{Pa}$

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