A pendulum has a length of 0.8 meters, a 3 kg mass attached to the end of it, and when it is released from a 15-degree angle away from its vertical equilibrium position, it has a frequency of 0.4 Hz. [a] Calculate the acceleration due to gravity of the planet you are on. [b] If you increase the mass at the end of the pendulum, explain how this would affect its frequency. [c] At what angle does the pendulum have the smallest acceleration? Explain your reasoning.
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 pendulum has a length of 0.8 meters, a 3 kg mass attached to the end of it, and when it is released from a 15-degree angle away from its vertical equilibrium position, it has a frequency of 0.4 Hz.
[a] Calculate the acceleration due to gravity of the planet you are on.
[b] If you increase the mass at the end of the pendulum, explain how this would affect its frequency.
[c] At what angle does the pendulum have the smallest acceleration? Explain your reasoning.
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