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Grade: 12th pass

                        

A man runs towards mirror at a speed of 10 m/s. What is the speed of his image?–(1) 20 m/s, (2) 10 m/s, (3) 30 m/s, (4) 5 m/s.

one year ago

Answers : (1)

Arun
25089 Points
							
Speed of image to a stationary observer :-   Speed of image = speed of object = 10 m/s
 
Speed of image as seen by the running man :-  
 
Image approaching the running man with same speed. 
Hence relative velocity of image speed with respect to running man = 10 + 10 = 20 m/s
one year ago
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