Question

Inertia force acting on the connecting rod cap is given by?

(a) Pi=mrω^2 r(θ+(frac{cos2 heta}{n_1}))

(b) Pi=mrω^2 r(cosθ+(frac{sin2 heta}{n_1}))

(c) Pi=mrω^2 r(cosθ+(frac{cos2 heta}{n_1}))

(d) Pi=mrω^2 r(secθ+(frac{cos2 heta}{n_1}))

Answer 1

Right choice is (c) Pi=mrω^2 r(cosθ+(frac{cos2 heta}{n_1}))

The explanation: Pi=mrω^2 r(cosθ+(frac{cos2 heta}{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.