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NEET 2012 (AIPMT, Prelims) · Rotational Kinematics & Dynamics

Rotational Kinematics & Dynamics question from NEET 2012 (AIPMT, Prelims)

Q71NEET 2012 · AIPMT · PRELIMSEasy

Rotational Kinematics & Dynamics

A car of mass 1000 kg negotiates a banked curve of radius 90 m on a frictionless road. If the banking angle is 45°, the speed of the car is

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Answer: (b)

Frictionless banked road: $\tan\theta = \frac{v^2}{Rg}$ .
$v^2 = Rg\tan 45^\circ = 90 \times 10 \times 1 = 900$
So the answer is (b) $v = 30\text{ m s}^{-1}$ .

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