A pulsar is a rapidly rotating neutron star that emits a radiobeam the way a lighthouse emits a light beam.We receive a radiopulse for each rotation of the star.The period T of rotation is foundby measuring the time between pulses.The pulsar in the Crab nebulahas a period of rotation of T = 0.033 s that is increasing at therate of 1.26 = 10-5 s/y. (a)What is the pulsar’s angular accelerationa? (b) If a is constant, how many years from now will the pulsarstop rotating? (c) The pulsar originated in a supernova explosionseen in the year 1054.Assuming constant a, find the initial T.
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.
A pulsar is a rapidly rotating neutron star that emits a radio
beam the way a lighthouse emits a light beam.We receive a radio
pulse for each rotation of the star.The period T of rotation is found
by measuring the time between pulses.The pulsar in the Crab nebula
has a period of rotation of T = 0.033 s that is increasing at the
rate of 1.26 = 10-5 s/y. (a)What is the pulsar’s angular acceleration
a? (b) If a is constant, how many years from now will the pulsar
stop rotating? (c) The pulsar originated in a supernova explosion
seen in the year 1054.Assuming constant a, find the initial T.
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