A) \[0{}^\circ \]
B) \[30{}^\circ \]
C) \[45{}^\circ \]
D) \[90{}^\circ \]
Correct Answer: D
Solution :
[d] \[\vec{p}\left( t \right)=A\left[ \hat{i}cos\left( kt \right)-\hat{j}\sin \left( kt \right) \right]\] \[F=\frac{d\vec{p}}{dt}=Ak[-\hat{i}cos(kt)-\hat{j}\sin (kt)]\] Here, \[\vec{F}.\vec{P}=0\] but \[\vec{F}.\vec{P}=Fp\cos \theta \] \[\therefore \cos \theta =0\Rightarrow \theta =90{}^\circ \]
You need to login to perform this action.
You will be redirected in
3 sec
