NEET-XII-Physics
neet 2020 questions with solutions year:2020
- #10The phase difference between displacement and acceleration of a particle in a simple harmonic motion is:
(A) `` \pi `` rad
(B) `` \frac {3\pi}{2} `` rad
(C) `` \frac {\pi}{2} `` rad
(D) `` zero ``
digAnsr: AAns : Displacement (x) of SHM
`` x=A\,sin \left(\omega t+\phi\right) \dots(i) ``
`` \frac{dx}{dt}=A\,\omega\,cos(\omega\,t+\phi) ``
Acceleration ``
(a)=\frac{d^{2}x}{dt^{2}} ``
`` \Rightarrow a=-\omega^{2}\,A\,sin(\omega\,t+\phi) ``
`` \Rightarrow a=\omega^{2}\,A\,sin(\omega\,t+\phi+\pi)\dots(ii) ``
from (1) & (2), phase difference between displacement and acceleration is `` \pi ``