Theory of Machine
When the two elements of a pair have __________ when in motion, it is said to a lower pair.

Body contact
Line or point contact
None of these
Surface contact

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Theory of Machine
A governor is said to be stable, if the

Radius of rotation of balls increases as the equilibrium speed increases
Radius of rotation of balls increases as the equilibrium speed decreases
Radius of rotation of balls decreases as the equilibrium speed decreases
Radius of rotation of balls decreases as the equilibrium speed increases

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