The bob of a pendulum is released from position $P$. What is the velocity of the image of the bob on the mirror $M$ at position $Q$ with respect to the bob?

An object approaches a convex mirror of radius of curvature $20 \,m$ along its optical axis. The image is observed to move from $\frac{25}{3} \,m$ to $\frac{50}{7} \,m$ from the mirror in $30 \,s$. What is the speed of the object in $km/h$?

$A$ point object on the principal axis at a distance $1.5\, cm$ in front of a concave mirror of radius of curvature $20\, cm$ has velocity $2\, mm/s$ perpendicular to the principal axis. The velocity of image at that instant will be.....$mm/s$

If an observer is moving away from a stationary plane mirror at a speed of $6 \, m/s$,then the speed of the image with respect to the observer is ..... $m/s$.

Car $B$ overtakes another car $A$ at a relative speed of $40 \, ms^{-1}$. How fast will the image of car $B$ appear to move in the mirror of focal length $10 \, cm$ fitted in car $A$,when the car $B$ is $1.9 \, m$ away from the car $A$? (In $ms^{-1}$)

Find the velocity of the image in the situation shown in the figure. (All velocities are in $m/s$)