If the pendulum has a mass of 2.20 kg and the pivot (axis) is located 0.350 m from the center of mass, determine the rotational inertia I of the pendulum. b. What length would a simple pendulum need to have in order to have the same period of motion as this physical pendulum? c. What spring constant k should you use if you want to create an oscillating mass (1.45 kg) on a spring that has the same period as the pendulum above.
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.
A physical pendulum in the form of a planar (flat) metal star moves in
a. If the pendulum has a mass of 2.20 kg and the pivot (axis) is located 0.350 m from the center of mass, determine the rotational inertia I of the pendulum.
b. What length would a simple pendulum need to have in order to have the same period of motion as this physical pendulum?
c. What spring constant k should you use if you want to create an oscillating mass (1.45 kg) on a spring that has the same period as the pendulum above.
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