A person examines the image of his face in a flat mirror, moving the mirror away from

A person examines the image of his face in a flat mirror, moving the mirror away from himself at a speed of 8 cm / s. How fast is the face image moving?

Since the image in the mirror needs to cover a double distance (from the object to the mirror and back), the speed of the real object will be twice the speed of movement in the mirror. So we get the following value:
2 * 8 cm / s = 16 cm / s.
Answer: the speed of the face image is 16cm / s



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