Physics - Circular Motion Question with Solution | TestHub

PhysicsCircular MotionDynamicsMedium2 minQB
PhysicsMediumsingle choice
Passage / Comprehension

A very small cube of mass is placed on the surface of a funnel as shown in the figure. The funnel is rotating about its vertical axis of symmetry with angular velocity ''. The wall of the funnel makes an angle with the horizontal. The distance of the cube from the axis of rotation is , and the frictional coefficient is . (Take )

image.png

For what value of there would be no frictional force acting between the surfaces ?

Options:

Answer:
B
Solution:

Here no frictional force is acting on block :

FBD of cube

image.png

Stream:JEESubject:PhysicsTopic:Circular MotionSubtopic:Dynamics
⏱ 2mℹ️ Source: QB

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