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What is the correct answer?

4

When the crank is at the outer dead centre, in a reciprocating steam engine, then the acceleration of the piston will be

A. ω² r {(n + 1)/n}

B. ω² r {(n - 1)/n}

C. ω² r {n/(n + 1)}

D. ω² r {n/(n - 1)}