Angular SHM and Simple Pendulum: Practice Problem & Solution

Solution Explained:

To solve this problem, we apply the core principles of Angular SHM and Simple Pendulum. Understanding the underlying formula is key to arriving at the correct answer below:

Time period $ T = 2\pi\sqrt{\frac{l}{g_{eff}}} $. To decrease the period, $ g_{eff} $ must increase. Moving upward with uniform acceleration $ a $ gives $ g_{eff} = g + a $, which increases effective gravity and decreases the period.