Theory of Machine
Which of the following is a lower pair?

Piston and cylinder
Ball and socket i
Both (A) and (B) above
Cam and follower

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

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