Theory of Machine
The dynamic friction is the friction experienced by a body, when the body

Is at rest
None of these
Just begins to slide over the surface of the other body
Is in motion

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Theory of Machine
Which is the false statement about the properties of instantaneous center?

The two rigid links which have no linear velocity relative to each other at this center have the same linear velocity to the third rigid link
At the instantaneous center of rotation, one rigid link rotates instantaneously relative to another for the configuration of mechanism considered
The two rigid links have no linear velocities relative to each other at the instantaneous center
The double center can be denoted either by O2 or O12, but proper selection should be made

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