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IIT JEE 2006 Paper : PHYSICS Section II - Multiple Answers

Each question has one or more than one correct choice among (a), (b), (c) and (d). Write down all the correct choices in alphabetical order without any spaces in between.
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A solid cylinder of mass m and radius r rolls down without slipping on a rough inclined plane of inclination θ, the coefficient of friction between the cylinder and the plane being μ. Then,

(a) frictional force is dissipative.
(b) frictional force is necessarily μg cosθ.
(c) frictional force decreases on decreasing θ.
(d) frictional force favours rotational motion but opposes translational motion.


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