Figures 14.25 correspond to two circular motions. The radius of the circle, the period of revolution, the initial position, and the sense of revolution (i.e. clockwise or anti-clockwise) are indicated on each figure.

Obtain the corresponding simple harmonic motions of the x-projection of the radius vector of the revolving particle P, in each case.

Explanation

(a) x = - 3 sin `pit` where x is in cm.
(b) x = - 2 cos `pi/2t` where x is in cm.