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Inertia force acting on the connecting rod cap is given by?(a) Pi=mrω^2 r(θ+\(\frac{cos2\theta}{n_1})\)(b) Pi=mrω^2 r(cosθ+\(\frac{sin2\theta}{n_1})\)(c) Pi=mrω^2 r(cosθ+\(\frac{cos2\theta}{n_1})\)(d) Pi=mrω^2 r(secθ+\(\frac{cos2\theta}{n_1})\)The question was posed to me by my school principal while I was bunking the class.The above asked question is from IC Engine in division Design of IC Engine Components of Automotive Engine Design

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Right choice is (C) Pi=mrω^2 r(cosθ+\(\frac{cos2\theta}{n_1})\)

The explanation: Pi=mrω^2 r(cosθ+\(\frac{cos2\theta}{n_1})\)is the right answer where Pi is the INERTIA force, MR is the mass of reciprocating parts, ω is the ANGULAR VELOCITY of the crank, r is the crank radius, n1 is the ratio of L/r and θ is the angle of inclination.



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