13. The rear view mirror of a car is a plane mirror. A driver is reversing his car at a speed of 2 m/s. The driver sees in his rear view mirror the image of a truck parked behind his car. The speed at which the image of the truck appears to approach the driver will be
(i) 1 m/s           (ii) 2 m/s    (iii) 4 m/s         (iv) 8 m/s

Answers (1)

We are given that the speed of the car is 2 m/s which implies, the car is approaching the truck with a speed of 2 m/s.

Hence the speed at which the image of the truck appears to approach the driver will be:   2\times2  =  4 m/s

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