A compound pendulum experiment was carried out in the laboratory to determine the radius of gyration about a mass centre of a rigid body experiencing vibration under the action of gravity. (i) List the apparatus used for conducting this experiment. (ii) State three assumptions necessary in order to achieve a reliable result. b. The body is given a slight displacement without rotation and the result obtained from several test experiments which is tabuiated beiow Length of Mass Centre (L) Number of Oscillations (N) Time of Oscillations (t) 27.21 26.98 26.22 37 32 20 20 27 20 22 20 25.63 26.49 17 20 (1) Plot a graph of T against L (t) Plot a graph of TL against L? (面) Find the slope le nendulum
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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