One end of a string is attached to an object of mass M; When the object is raised to a position X that is a height H above its lowest point and released from rest, the object undergoes simple harmonic motion. When the object passes through the equilibrium position Y it has a speed of v. Which of the following methods could a student use to determine the total mechanical energy at Position Y & why. Select 2 answers. A.ME = KE - PE because energy changes from KE to PE when the pendulum swings from X to Y B.ME = PE - KE because energy changes from PE to KE when the pendulum swings from Y to X C.ME = KE because this represents the maximum KE at Y as the system has 0 PE at Y D.ME = PE because this equation represents the maximum PE at X if the system has zero PE at Y
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.
One end of a string is attached to an object of mass M; When the object is raised to a position X that is a height H above its lowest point and released from rest, the object undergoes simple harmonic motion. When the object passes through the equilibrium position Y it has a speed of v. Which of the following methods could a student use to determine the total mechanical energy at Position Y & why. Select 2 answers.
A.ME = KE - PE because energy changes from KE to PE when the pendulum swings from X to Y
B.ME = PE - KE because energy changes from PE to KE when the pendulum swings from Y to X
C.ME = KE because this represents the maximum KE at Y as the system has 0 PE at Y
D.ME = PE because this equation represents the maximum PE at X if the system has zero PE at Y
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