1 answer:
It is useful to determine the distance the swing is below the pivot point when it is at its highest point of travel. That distance is
... 7 m + 0.8 m - 3.4 m = 4.4 m
The the cosine of the angle of interest is
... cos(θ) = 4.4/7
... θ = arccos(4.4/7) ≈ 51.055°
The angle is about 51°.
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