the rear view mirror of a car is a plane mirror a driver is Reverse in his car at a speed of 2 metre per second 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 appeared to approach the driver will be


Because velocity of image and object with respect to mirror are equal and oppositeHence,Vi/m=Vo/mVi+Vo=2VmHere object is truck and it is at rest and mirror is moving with car,Hence,   Vi+0=2×2= 4 m/s , towards the car.

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