Physics - SHM Question with Solution | TestHub

Here : length of pendulum $=l$maximum angular displacement $=\theta$ mass of the bob $=m$ Now height of the bob at maximum angular displacement is $h=l-l\cos \theta =l(1-\cos \theta )$ Also at the end of the displacement kinetic energy of the bob = potential energy of the bob $=mgh=mgl(1-\cos \theta )$