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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This key question is from Forces on the Reciprocating Parts of an Engine Neglecting Weight of the Connecting Rod in division Inertia Forces in Reciprocating Parts of Machine Dynamics