Equation of a simple harmonic motion is given as x=3 sin 20 πt+4 cos 20πt where x is in cms and t in seconds. The amplitude is:
7 cm
4 cm
5 cm
3 cm
x=3 sin 20πt+4 cos 20πt=535sin 20πt+45cos 20 πt =5 sin 20 πt+53o, amplitude = 5 cm