# Acceleration, Friction Force, Coefficient of Friction

A hollow, spherical shell with mass 2.00 kg rolls without slipping down a slope angled at 34.0 degrees

A) Find the acceleration (take free fall to be 9.8 m/s^2)

B) Find the friction force

C) Find the minimum coefficient of friction needed to prevent slipping

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#### Solution Preview

Since the sphere doesn't slip;

torque = (moment of inertia of sphere)(angular acceleration) = (force due to friction)(radius of sphere)

Iα = (Ff)(r)

where;

I=2mr^2/3

α=a/r

if we ...

#### Solution Summary

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