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

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Theory of Machine
Which of the following is false statement in respect of differences between machine and structure?

Efficiency of machines as well as structures is below 100 %
Machines transmit mechanical work, whereas structures transmit forces
Machines modify movement and work, whereas structures modify forces
In machines, relative motion exists between its members, whereas same does not exist in case of structures

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