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Speed or acceleration of the image in a car's rear-view mirror

This type of question, asked 2 times: 2021 Paper 18, 22 Jan 2025. All 2 questions below, oldest first.

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  1. Question 1

    2021 Paper 18

    3
    Car B overtakes another car A at a relative speed of 40 ms−140\text{ }ms^{-1}. How fast will the image of car B appear to move in the mirror of focal length 10 cm10\text{ }cm fitted in car A, when the car B is 1.9 m1.9\text{ }m away from car A?

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  2. Question 2

    22 Jan 2025

    22
    The driver sitting inside a parked car is watching vehicles approaching from behind with the help of his side view mirror, which is a convex mirror with radius of curvature =2 m= 2\text{ }m. Another car approaches him from behind with a uniform speed of 90 km/hr90\text{ }km/hr. When the car is at a distance of 24 m from him, the magnitude of the acceleration of the image of the side view mirror is ' aa '. The value of 100 a is ________ m/s2m/s^{2}.