Just my imagination
I was riding a bicycle at night. Then I noticed a roadside pole-light, and my shadow. What is true within my imagination.
A. Speed of my shadow is less than my speed.
B. Speed of my bicycle is less than the shadow's speed.
C. Both are equal.
D. Cant say sometimes more or sometimes less.
Image credit: Flickr StephenMitchell
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1 solution
Consider pole bulb as the origin. Now draw a radius vector from the origin passing through your head and terminating at the road. The tip of the vector on the road will signify your head's shadow. Now at a particular angular velocity w, the speed of the shadow will greater than your head's speed no matter where you are as v=rw so v is directly proportional to r.