Resonance: An object of mass of 2.0 kg hangs from an ideal massless spring with a spring constant of 50 N/m. An oscillating force F = (4.8 N) cos[(3.0 rad/s)t] is applied to the object. What is the amplitude of the resulting oscillations? You can neglect damping.
A) 0.15 m
B) 0.30 m
C) 1.6 m
D) 2.4 m
E) 0.80 m

Question

Quizplus · Accepted Answer

The amplitude of the resulting oscillations is given by:$$A = \frac{F_0}{k} = \frac{4.8 N}{50 N/m} = 0.096 m$$

Resonance: an Object of Mass of 2