What Angle Causes a Sphere to Begin Sliding?

[Paulbird20]

[SOLVED] Sphere: angle to begin sliding

Given a small mass on a sphere. Coef of static friction is .49 what angle would begin sliding.

I thought i would use inverse cos(.49/9.8) and i get 87 degrees but it is wrong any other equations i am missing?

 

[learningphysics]

Suppose the mass is m. What is the normal force in terms of m, g, theta?

What is the frictional force... and what is the force that is causing the object to slide...

 

[Paulbird20]

i think i figured it out i went and looked at some other equations and realized i needed to use tan instead of cos and i got the correct answer of 26.1 degrees Thank you for the tip.

 

[learningphysics]

i think i figured it out i went and looked at some other equations and realized i needed to use tan instead of cos and i got the correct answer of 26.1 degrees Thank you for the tip.

no prob. you're welcome.