Physics

Problem

A harmonic oscillator vibrates with amplitude of 4 cm and performs 150 oscillations in one minute. If the initial phase is

45^\circ

and it starts moving away from the origin, then the equation of motion is a.

0.04 \sin \left( 5\pi t + \frac{\pi}{4} \right)

0.04 \sin \left( 5\pi t - \frac{\pi}{4} \right)

0.04 \sin \left( 4\pi t + \frac{\pi}{4} \right)

0.04 \sin \left( 4\pi t - \frac{\pi}{4} \right)