The spring pendulum performs forced oscillations under the influence of an external periodic force.
| April 19, 2021 | education
The spring pendulum performs forced oscillations under the influence of an external periodic force. When the frequency of the force change is 0.8 Hz, resonance occurs. What is the mass of the weight of the pendulum if the spring rate is 50 N / m?
Decision:
T: 2p = √m / k
0.2 = √m / k
T = 1 / v = 1.25 s
m – 50 * 0.04 = 2kg
Answer: 2 kg
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