Figure 98.
PENDULUMS A simple pendulum is defined as an object swinging or suspended from a light wire or string. Pendulums have the ability to perform simple harmonic motion. Displacement in a pendulum is related to the arc length, defined by the letter s. The net force on the object will be the tangent to the arc, which will be equal to mass times the force of gravity times the sine of theta. The tension on the string will exactly cancel the component mass times the force of gravity times the cosine of theta, which is parallel to the string at all times. Figure 99 shows the pendulum swinging:
Figure 99.
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