A pendulum of 14 cms long oscillates through an angle of 18°. Find the length of the path described by its extremity.
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Answer:
4.4 cm
Step-by-step explanation:
Refer to the attached figure in which
r is length of pendulum Ф is the angle and BSA is the length of path we need to find
You can observe that
Length of path = length of arc subtending angle 18°
Length of path = (18° × 2 × π × 14)/360° [Length of arc = (Ф×2×π×r)/360]
= 14π / 10 or 4.4 cm
∴ Length of path described by its extremity = 4.4 cm
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