Theory of Machine
Pitch point on a cam is

The point on cam pitch curve having the minimum pressure angle
The point on cam pitch curve having the maximum pressure angle
Any point on pitch circle
Any point on pitch curve

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Theory of Machine
The inversion of a mechanism is

Changing of a higher pair to a lower pair
Obtained by fixing different links in a kinematic chain
Turning its upside down
Obtained by reversing the input and output motion

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Theory of Machine
Which of the following statements regarding laws governing the friction between dry surfaces are correct?

The friction force is independent of me area of contact.
The friction force is dependent on the materials of the contact surfaces.
The friction force is directly proportional to the normal force.
All of these

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