KCET 2019 Physics Solved Paper

A Point object is moving uniformly towards the pole of a concave mirror of focal length 25 cm along its axis as shown below. The speed of the object is 1 ms–1 . At t = 0, the distance of the object from the mirror is 50 cm. The average velocity of theimage formed by the mirror between time t = 0 and t = 0.25 s is