Which one of the following statements is correct for an experiment in which you have to determine k and n in the equation T = kl^ where Tis the period and I is the length of a simple pendulum? OB. Many swings should be timed in order to compensate for errors in the length measurement. OC. Few swings should be timed in order to reduce errors due to air resistance. OA Timing many swings leads to an accurate result because it reduces the error due to miscounting the number of swings and the error in the time measurement. OE. Using very short lengths of string gives accurate results because the period is shorter and so can be more accurately measured. D. The angle through which the pendulum swings should be large in order to reduce errors due to air resistance.
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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