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What is the correct answer?

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The effort of a Porter governor is equal to (where c = Percentage increase in speed, m = Mass of ball, and M = Mass on the sleeve)

A. c (m - M) g

B. c (m + M) g

C. c/(m + M) g

D. c/(m - M) g

Correct Answer :

B. c (m + M) g


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