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A mirror is p...

Question

A mirror is placed parallel to X-Y plane and an object is moving along the line X + Y = 4 with speed 4 m/s. What is the speed of image?

42 m / s

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4 m / s

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10 m / s

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6 m / s

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Solution

The correct option is B $4 m / s$
In the given data, it is mentioned that the mirror is placed parallel to the X - Y plane. and the line X + Y = 4 moving with speed of 4 m/sec contains in the X - Y plane
If the mirror is placed parallel to the plane in which the object is moving, the velocity of the object and the velocity of the image will be same. Therefore, the velocity of the image will be 4 m/sec.

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