I\'m confused with question 3,4,8,16,20, and 24. Spring 2011 Physics 211A The ne

Question

I'm confused with question 3,4,8,16,20, and 24.

Spring 2011 Physics 211A The next two questions refer to the following situation. A horizontal force of m below. The sphere has a mass M and a radius R and is on an incline having an angle e Exam III agnitude Fis applied on a line through the center of the sphere show If the f olds the sphere in equilibrium, what is the frictional force of the inclin the sphere if the coefficient of static friction of the incline is What magnitude of the force Fis needed to hold the sphere in equitrib A) F = Mg B) F=MgcosO

Explanation / Answer

3] f has to be zero, otherwise there will be net torque as all other forces pass through center.

option e

4]Balancing forces along the incline,

F cos theta = mg sin theta

F = mg tan theta

option d

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