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Question: Consider a sphere with mass m sliding, from zero initial velocity (position A), through a trajectory (in the vertical plane), passing through B, contained into the circumference of radius R with a velocity of modulus V, as the figure indicates. The friction coefficient between the particle and the trajectory is μc. The modulus of the friction force on the sphere at the position B is equal to? a) μc.M.g b) μc.M.gsen θ c) μc.M.gcos θ d) μc.M.( v² + Rgcos θ) / R e) μc.v².gsen θ / R Im not knowing how to set up the situation properly, so Im asking you guys. Thanks.

Question: Consider a sphere with mass m sliding, from zero initial velocity (position A), through a trajectory (in the vertical plane), passing through B, contained into the circumference of radius R with a velocity of modulus V, as the figure indicates.
The friction coefficient between the particle and the trajectory is μc. The modulus of the friction force on the sphere at the position B is equal to?
 
a) μc.M.g
b) μc.M.gsenθ
c) μc.M.gcosθ
d) μc.M.( v² + Rgcosθ) / R
e) μc.v².gsenθ / R
 
Im not knowing how to set up the situation properly, so Im asking you guys.
 
Thanks.

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Grade:12th pass

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