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Q.

A particle is undergoing uniformly accelerated circular motion with angular retardation $π$ rad/s². If the angular velocity of the particle at t = 0 is 2 $π$ rad/s, the velocity and acceleration vectors of the body at t = 0 s are best represented by

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a

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b

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c

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d

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answer is B.

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Detailed Solution

${\vec{a}}_{r}$ must be towards the centre of the circle.

${\vec{a}}_{t}$ must be opposite to $\vec{v}$ .

The resultant acceleration $\vec{a}$ must be at an angle with radius and inside the wheel, not outside.
Correct answer (2).

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A particle is undergoing uniformly accelerated circular motion with angular retardation π rad/s2. If the angular velocity of the particle at t = 0 is 2π rad/s, the velocity and acceleration vectors of the body at t = 0 s are best represented by