# A ring of radius  is first rotated with an angular velocity  and then carefully placed on a rough horizontal surface. The coefficient of friction between the surface and the ring is . Time after which its angular speed is reduced to half is a) b) c) d)

## Question ID - 100106 :- A ring of radius  is first rotated with an angular velocity  and then carefully placed on a rough horizontal surface. The coefficient of friction between the surface and the ring is . Time after which its angular speed is reduced to half is a) b) c) d)

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Answer Key : (d) -

(d)

Taking  about CM

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In the question given below, there is a number series with one term missing shown by “?”.  The term is given as one of the alternatives among four options given below it.  Find the term.

 (1, 6), (5, 2), (3, 4), (0, 7), (-1, 8), ? (a) (4, 4) (b) (-2, 7) (c) (7, 7) (d) (2, 5)

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