Maximum safe speed on unbanked road – Rankers Physics

Dynamics of Circular Motion: Practice Problem & Solution

An unbanked road has a radius of curvature equal to \(30\text{ m}\). The maximum speed at which a car can make a turn if the coefficient of friction is \(0.75\), is
\(10\text{ m/s}\)
\(30\text{ m/s}\)
\(15\text{ m/s}\)
\(5\text{ m/s}\)

Short Solution (Best for NEET):

To solve this problem, we apply the core principles of Dynamics of Circular Motion. Understanding the underlying formula is key to arriving at the correct answer below:

The maximum safe speed on an unbanked circular curve is \(v_{\max} = \sqrt{\mu g r}\). Substituting the values, \(v_{\max} = \sqrt{0.75 \times 10 \times 30} = \sqrt{225} = 15\text{ m/s}\).

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