Theory of Machine
In order to give a complete secondary balance of a multi-cylinder inline engine,

The algebraic sum of the secondary forces must be equal to zero
The algebraic sum of the couples about any point in the plane of the secondary forces must be equal to zero
Both (A) and (B)
None of these

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Theory of Machine
A point B on a rigid link AB moves with respect to A with angular velocity ω rad/s. The total acceleration of B with respect to A will be equal to

Vector sum of radial component and Coriolis component
Vector difference of radial component and tangential component
Vector sum of tangential component and Coriolis component
Vector sum of radial component and tangential component

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