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The figure shows a pendulum with length L and the angle from the vertical to the pendulum. It can be shown that
, as a function of time, satisfies the nonlinear differential equation
where
we can use the linear approximation
Lordosis
A curvature of the spine, typically inward at the lower back, which can be a normal posture or indicative of spine conditions when excessive.
Posture Shift
A change in the positioning or alignment of the body, which can indicate discomfort, readiness to act, or a reaction to external stimuli.
Enlarging Fetus
Refers to the growth and development of a fetus inside the uterus over the course of a pregnancy.
Scoliosis
A medical condition characterized by a sideways curvature of the spine, which can impact posture and movement.
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