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A bob of mass m = 0.250 kg is suspended from a fixed point with a...

A bob of mass m = 0.250 kg is suspended from a fixed point with a massless string of length L = 21.0 cm . You will investigate the motion in which the string traces a conical surface with half-angle θ = 25.0 ∘.

What tangential speed v must the bob have so that it moves in a horizontal circle with the string making an angle 25.0 ∘ with the vertical?

Express your answer numerically in meters per second.

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