A plane mirror and an object approach each other with speeds of 5m/s and 10 m/s respectively. The speed of the image will be 20 $\frac{m}{s e c}$ .

20 m/s

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Solution

The correct option is A
20 m/s

Total speed of the image = Speed of the object + 2 $\times$ Speed of the mirror = 10 + 2 $\times$ 5 = 20 $\frac{m}{s e c}$

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A plane mirror and an object approach each other with speeds of 5m/s and 10 m/s respectively. The speed of the image will be 20 msec.

The correct option is A 20 m/s Total speed of the image = Speed of the object + 2 × Speed of the mirror = 10 + 2 × 5 = 20 msec

A plane mirror and an object approach each other with speeds of 5m/s and 10 m/s respectively. The speed of the image will be 20 $\frac{m}{s e c}$ .

The correct option is A
20 m/s

Total speed of the image = Speed of the object + 2 $\times$ Speed of the mirror = 10 + 2 $\times$ 5 = 20 $\frac{m}{s e c}$