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Assertion: Velocity and acceleration of ...

Assertion: Velocity and acceleration of a particle in circular motion at some instant are:
`v=(2hat(i))ms^(-1)` and `a=(-hat(i)+2hat(j))ms^(-2)` , then radius of circle is `2m` .
Reason: Speed of particle is decreasing at a rate of `1ms^(-2)` .

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