Problem 4: A mass m at the end of a spring of spring constant k is undergoing simple harmonic oscillations with amplitude A. Part (a) At what positive value of displacement x in terms of A is the potential energy 1/9 of the total mechanical energy? Expression : x = Select from the variables below to write your expression. Note that all variables may not be required. a, B, n, 0, A, B, d, g, h, j, k, m, P, S, t Part (b) What fraction of the total mechanical energy is kinetic if the displacement is 1/2 the amplitude? Numeric : A numeric value is expected and not an expression. KEfraction Part (c) By what factor does the maximum kinetic energy change if the amplitude is increased by a factor of 3? Numeric : A numeric value is expected and not an expression. KE' max ! KEmax
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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