Q. A point object is moving with velocity $6 \hat{i}+\hat{j}+2 \hat{k}$ $( m / s )$ in front of a plane mirror whose reflecting side is $x z$-plane. If the mirror also moves with a velocity $\hat{i}-\hat{j}$ $( m / s )$, then what is the speed (in $m / s$ ) of the image? (Round-off the answer to nearest integer)
Ray Optics and Optical Instruments
Solution:
