Theory of Machine
The equivalent length of a simple pendulum which gives the same frequency as a compound pendulum is

h²/(kG² + h²)
(kG² + h²)/h
(kG² + h²)/h²
h/(kG² + h²)

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Theory of Machine
Pitch point on a cam is

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

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