Q.
The displacement $x$(in meter) of a particle performing simple harmonic, motion is related to time t (in second) as $x = 0.05\cos\left( 4\pi t + \frac{\pi}{4} \right)$.The frequency of the motion will be
A) 05 Hz
B) 1.0 Hz
C) 1.5 Hz
D) 2.0 Hz
Explanation
(d) Compare the given equation with the standard form
$y = r\cos\left\lbrack \frac{2\pi t}{T} - \frac{2\pi x}{\lambda} \right\rbrack$
Coefficient of $t = \frac{2\pi}{T} = 2\pi n = 4\pi,n = 2\ Hz$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.