An object of mass $m$ hangs from a fixed point by means of a spring. The spring constant is $k$. The object is made to undergo vertical oscillations with period $T$. Which equation for $T$ is homogeneous with respect to base units?
- A$T = 2\pi \left( \frac{k}{m} \right)$
- B$T = 2\pi \left( \frac{m}{k} \right)$
- C$T = 2\pi \sqrt{\frac{k}{m}}$
- D$T = 2\pi \sqrt{\frac{m}{k}}$