The natural frequency of free longitudinal vibrations is equal to (where m = Mass of the body, s = Stiffness of the body, and = Static deflection of the body)

• A. <img src="/_files/images/mechanical-engineering/theory-of-machines/513-458-1.png">
• B. <img src="/_files/images/mechanical-engineering/theory-of-machines/513-458-2.png">
• C. <img src="/_files/images/mechanical-engineering/theory-of-machines/514-467-1.png">
• D. any one of these