To solve this problem it is necessary to apply the related concepts to the moment of inertia in a disk, the conservation of angular momentum and the kinematic energy equations for rotational movement.
PART A) By definition we know that the moment of inertia of a disk is given by the equation
Where
M = Mass of the disk
R = Radius
Replacing with our values we have
The initial angular momentum then will be given as
Therefore the total moment of inertia of the table and the disc will be
The angular velocity at the end point will be given through the conservation of the angular momentum for which it is understood that the proportion of inertia and angular velocity must be preserved. So
Therefore the new angular velocity is 1.15rad/s
PART B) Through the conservation of rotational kinetic energy we can identify that its total change is subject to
Therefore the change in kinetic energy is 0.034J
Answer:
B
Explanation:
It will give the of 6 which is least of all the other forces.
4.0²+4.0² = c²
6 = c
Answer:True
Explanation: Distant galaxies appear to be larger than those close by because of cosmic expansion. light from nearer galaxies travel farther and makes the other to be billions of years away. The farther it takes to get to another galaxy, the bigger it appears
Answer:
(a) the net charge inside the closed surface.
Explanation:
In Gauss' Law, Qencl refers to the net charge inside the Gaussian surface. This surface is usually taken as a symmetric geometric surface, but this is merely for simplicity. Gauss' Law holds for any closed surface. Inside this surface there can be insulators as well as conductors. Regardless of the geometry or the materials inside, Qencl refers to the net charge inside the closed surface. The charge outside the surface is irrelevant for Gauss' Law, therefore all the charge in the physical system is not included in Gauss' Law.
