Astudent sits on a rotating stool holding two 2.8-kg objects. when his arms are extended horizontally, the objects are 1.0 m from the axis of rotation and he rotates with an angular speed of 0.75 rad/s. the moment of inertia of the student plus stool is 3.0 kg · m2 and is assumed to be constant. the student then pulls in the objects horizontally to 0.34 m from the rotation axis. (a) find the new angular speed of the student.
mass of objects m is 2.8 kg
objects is away from axis of rotation
moment of inertia of stool and student is
New distance of objects
conserving Angular momentum
Initial Angular momentum
For Second case
luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.