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:
A malleable material is one in which a thin sheet can be easily formed by hammering or rolling. ... In contrast, ductility is the ability of a solid material to deform under tensile stress.
Positive
In an LED, the longer lead is always connected to the positive terminal
Answer:
50 degrees
Explanation:
Usually in physics in solving such questions refractive index of air is taken as 1.00 (n=1.00) by assuming that air is a vacuum. Hence, the light ray passes from water to air at an angle of incident of 40 degrees, it means that it has angle of 50 degrees to the normal line.