Chapter 12 of 2363 min read

Circular motion dynamics, banking of roads

Why this is asked: tanθ = v²/rg is only the speed needing zero friction on a banked curve — with friction present, safe speed becomes a range between a v_min and v_max, both formulas picking up μ.

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Test yourself

•A bob is whirled in a horizontal plane by means of a string with an initial speed of $ω$ rpm. The tension in the string is $T$ . If the speed becomes $2 ω$ while keeping the same radius, the tension in the string becomes:

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