The two-cylinder engine crankshaft is rotating counterclockwise with a constant angular velocity = 45 rad/s. Determine

The two-cylinder engine crankshaft is rotating counterclockwise with a constant angular velocity ω = 45 rad/s. Determine the magnitude and direction of the primary shaking force in terms of crank angle θ. If correcting masses are required to balance the primary shaking force, then determine:

(a) the magnitudes and orientations of the inertial forces created by these correcting masses, and (b)

the magnitudes and orientations of the correcting masses if RC1 =RC2 =6 in. Determine the answers for parts

(a) and

(b) when the reference line attached to crank 1 is at crank angle θ = 210◦.