The rotation of earth about its axis is

Which of the following examples represent (nearly) simple harmonic motion and which represent periodic but not simple harmonic motion? The rotation of earth about its axis.

If the speed of rotation of earth about its axis is increased,

Find the duration of the day if the rotation of earth about its axis speeds up in such a way that a person on the equator feels weightlessness.

Statement-I: If the earth expands in size without any change in mas, the length of the day would increase. statement-II: The rotation of earth about its axis follows the law of conservation of angular momentum.

Among the following which are examples of simple harmonic motion? i)the rotation of earth about its axis, ii)vertical oscillation of a loaded spring, iii)Oscillations of simple pendulum, iv)Uniform circular motion.

The rotation of the earth about its axis is periodic but not simple harmonic. Justify.

Assertion : The rotation of the earth about its axis is a S.H.M. Reason : The earth completes each roation about its axis in 24 hours while orbiting around earth.