The primary unbalanced force due to inertia of reciprocating parts in a reciprocating engine is given by (where m = Mass of reciprocating parts, ≈ì√¢ = Angular speed of crank, r = Radius of crank, ≈í‚àè = Angle of inclination of crank with the line of stroke, and n = Ratio of the length of connecting rod to radius of crank)$

m.≈ì√¢¬¨‚â§.r (sin 2≈í‚àè/n)

m.≈ì√¢¬¨‚â§.r sin≈í‚àè

m.≈ì√¢¬¨‚â§.r cos≈í‚àè

m.≈ì√¢¬¨‚â§.r (cos 2≈í‚àè/n)

The primary unbalanced force due to inertia of reciprocating parts in

1.	The primary unbalanced force due to inertia of reciprocating parts in a reciprocating engine is given by (where m = Mass of reciprocating parts, ≈ì√¢ = Angular speed of crank, r = Radius of crank, ≈í‚àè = Angle of inclination of crank with the line of stroke, and n = Ratio of the length of connecting rod to radius of crank)$
A.	m.≈ì√¢¬¨‚â§.r sin≈í‚àè
B.	m.≈ì√¢¬¨‚â§.r cos≈í‚àè
C.	m.≈ì√¢¬¨‚â§.r (sin 2≈í‚àè/n)
D.	m.≈ì√¢¬¨‚â§.r (cos 2≈í‚àè/n)
Answer» C. m.≈ì√¢¬¨‚â§.r (sin 2≈í‚àè/n)

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