Questions
A sphere cannot roll without applying external force on
a
a smooth inclined surface
b
a smooth horizontal surface
c
a rough inclined surface
d
a rough horizontal surface
detailed solution
Correct option is B
On inclined surface, gravitational force provides torque. On rough surface, friction provides torque for rolling but on horizontal smooth surface, external force is needed to create torque.Talk to our academic expert!
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A round uniform body of radius R, mass M and moment of inertia I, rolls down (without slipping) an inclined plane making an angle with the horizontal. Then its acceleration is
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