engineering recuitment BHEL Engineer Trainee Mock Test 2025 Mechanical Vibrations Undamped Free Vibration
In a spring-mass vibrating system, the natural frequency of vibration is reduced to half the initial value, when a second spring is added to the first spring in series. What will be the ratio of stiffness of first spring to that of the second spring?
1
3
2
2
3
1/2
4
1/3