Choose the correct option in question
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. 1m/s ii. 2m/s
iii. 4m/s iv. 8ms/
The correct answer is: option iii.
Since the speed of the car = 2m/s, so the distance between the car and the truck will decrease at double rate as the image of truck travels a distance twice the distance by car. So, the speed at which the image of the truck appears to approach the driver = 4m/s.