Question

A spring-mass system oscillates with a frequency v. If it is taken in an elevator slowly accelerating upward, the frequency will
(a) increase
(b) decrease
(c) remain same
(d) become zero

Answer 1

(c) remain same

Because the frequency ($\nu =\frac{1}{2\pi }\sqrt{\frac{k}{m}}$) of the system is independent of the acceleration of the system.