A platform is supported by four steel wires. Each wire is $5.0\,\text{m}$ in length and has a diameter of $3.0\,\text{mm}$. The Young modulus of steel is $2.1 \times 10^{11}\,\text{Pa}$. The wires obey Hooke’s law when a load with mass $200\,\text{kg}$ is placed on the platform. Determine the amount by which the platform drops due to the extension of the wires?
- A$1.7 \times 10^{-4}\,\text{m}$
- B$4.1 \times 10^{-4}\,\text{m}$
- C$1.7 \times 10^{-3}\,\text{m}$
- D$6.6 \times 10^{-3}\,\text{m}$