Physics-
General
Easy

Question

Two identical discs of same radius R are rotating about their axes in opposite directions with the same constant angular speed omega. The discs are in the same horizontal plane. At time t equals 0, the points P and Q are facing each other as shown in figure. The relative speed between the two points P and Q is V subscript r end subscript as function of times best represented by

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The correct answer is:



    So, V subscript r end subscript equals 2 omega R sin invisible function application left parenthesis omega t right parenthesis
    At t equals T divided by 2 comma blank V subscript r end subscript equals 0
    So two half cycles will take place

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