Imagine a metal ball suspended by a string, swinging back and forth at a certain frequency (f). Now, if we were to place this entire setup in an elevator descending with an acceleration of 0.28g, what would be the new frequency (f') of the ball's oscillations?

• A. f' = 0.85f
• B. f' = 0.72f
• C. f' = 1.2f
• D. f' = 1.4f

Answer: (A)