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## Problem 2 A spring-mass system is subjected to a harmonic force whose frequency is close to the natural frequency of the system. If the forcing frequency is 39.8 Hz and the natural frequency is 40.0 Hz, determine the period of beating. Problem 3 A mass m is suspended from a spring of stiffness 4000 N/m and is subjected to a harmonic force having an amplitude of 100 N and a frequency of 5 Hz. The amplitude of the forced motion of the mass is observed to be 20 mm. Find the value of m. Answers with interpretation

Problem 2
A spring-mass system is subjected to a harmonic force whose frequency is close to the natural frequency of the system. If the forcing frequency is 39.8 Hz and the natural frequency is 40.0 Hz, determine the period of beating.

Problem 3
A mass m is suspended from a spring of stiffness 4000 N/m and is subjected to a
harmonic force having an amplitude of 100 N and a frequency of 5 Hz. The amplitude
of the forced motion of the mass is observed to be 20 mm. Find the value of m.

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