it of the moon about the earth is approximately circular, with a mean radius of 3.84 x 10% m. It takes 27.3 days for the moon to complete a revolution about the earth. Assuming the earth's moon only interact with the earth (No other bodies in space) (1) Find the mean orbital speed of the moon in unit of m/s. (2) Find the mean radial acceleration of the moon in unit of m/s2 (3) Assuming a star-body/girl of mass 100kg flies together with the moon, neglect the attraction due to the moon and all other non- earth bodies in space, what is the force on the star-boy/girl?
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.
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