1.

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

Answer»

 (c) remain same

EXPLANATION:  

The time period of a spring-mass system is given by T=2π√(m/k) Since this expression is not dependent on the acceleration due to the gravity, the time period T and hence the frequency (since ν=1/T) remains the same. The option (c) is correct.



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