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  4. A ball is projected from top of the table with initial speed u at an angle of inclination q, motion of image of ball w.r.t ball

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Q. A ball is projected from top of the table with initial speed $u$ at an angle of inclination $q$, motion of image of ball w.r.t ballPhysics Question Image

Ray Optics and Optical Instruments

Solution:

image
$\vec{V}_{I_0}=\vec{V}_{I}-\vec{V}_{0}$
$\vec{V}_{I_0}=-u \cos \theta \hat{i}+u \sin \hat{j}-(u \cos \theta \hat{i}+u \sin \theta \hat{j})$
${V}_{I_0}=-2 u \cos \theta \hat{i}$
Straight line and horizontal