7. The motion of the harmonic oscillator pictured below is damped due to the disk attached to thebottom of the weight having to oscillate up anddown in a cup of water. The suspended weighthas a mass of 0.3 kg, while the constant of thespring is k = 6 N/m and the damping coefficientis b = 0.7 kg/s. Determine: a) the period T of thedamped oscillator, b) the time constant, tc, andc) practical lifetime of the damped oscillator.
Simple harmonic motion
Simple harmonic motion is a type of periodic motion in which an object undergoes oscillatory motion. The restoring force exerted by the object exhibiting SHM is proportional to the displacement from the equilibrium position. The force is directed towards the mean position. We see many examples of SHM around us, common ones are the motion of a pendulum, spring and vibration of strings in musical instruments, and so on.
Simple Pendulum
A simple pendulum comprises a heavy mass (called bob) attached to one end of the weightless and flexible string.
Oscillation
In Physics, oscillation means a repetitive motion that happens in a variation with respect to time. There is usually a central value, where the object would be at rest. Additionally, there are two or more positions between which the repetitive motion takes place. In mathematics, oscillations can also be described as vibrations. The most common examples of oscillation that is seen in daily lives include the alternating current (AC) or the motion of a moving pendulum.
7. The motion of the harmonic oscillator pictured below is damped due to the disk attached to the
bottom of the weight having to oscillate up and
down in a cup of water. The suspended weight
has a mass of 0.3 kg, while the constant of the
spring is k = 6 N/m and the damping coefficient
is b = 0.7 kg/s. Determine: a) the period T of the
damped oscillator, b) the time constant, tc, and
c) practical lifetime of the damped oscillator.
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