In the presence of frictional resistance, the expression for piston effort is

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📊 Dynamics of Machines

Q. In the presence of frictional resistance, the expression for piston effort is

(A) f(l) – f(i)
(B) f(l) + f(i)
(C) f(l) ± f(i) – r(f)
(D) f(l) – f(i) + r(f)

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✅ Correct Answer: (C) f(l) ± f(i) – r(f)

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