Engineering Mechanics
The equivalent length of a simple pendulum which gives the same frequency as compound pendulum is

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

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Engineering Mechanics
According to Newton's first law of motion,

The rate of change of momentum is directly proportional to the impressed force, and takes place in the same direction, in which the force acts
Everybody continues in its state of rest or of uniform motion, in a straight line, unless it is acted upon by some external force
None of these
To every action, there is always an equal and opposite reaction

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