Amachine part has the shape of a solid uniform sphere of mass 215 g and diameter 3.10 cm . it is spinning about a frictionless axle through its center, but at one point on its equator it is scraping against metal, resulting in a friction force of 0.0200 n at that point. find its angular acceleration. let the direction the sphere is spinning be the positive sense of rotation.

Explanation:

Given

mass of sphere

diameter

Friction Force=0.02 N

here friction force will provide torque

thus

a.) travels faster in solids because the particles are closer together.

air is a gas water is a liquid

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.