The rear view mirror of a car is a plane mirror. A driver is reversing his car at a speed of 2 m/s.
Choose the correct option
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
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2 Answers
(ii) 2 m/s
Explanation:
As the car moves 2 m backward, the mirror also moves 2 m backward, so image comes 2 m forward.
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Correct answer is (iii) 4 m/s
Explanation: As the car moves 2m/s back ward, the mirror also moves 2m/s backward, so images comes 4m/s forward. (i.e., 2m/s + 2ms).
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