Water flowing in a stream erodes through abrasion, saltation, traction of material along the river bed etc, cutting down into the ground mostly just below it, creating a V shaped valley.
Ice in glaciers scours its way through the rock material beanth it. Because of this bulldozer kind of effect, it creates a U shaped valley.
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
The answer is b/ cope a small section word-for-word
Answer:
100J
Explanation:
When you raised the object by 14 its store potential energy If we take ground level as its potential energy is zero. When its falling all the potential energy is transferred to the kinetic energy. According to the conservation of energy then
Potential energy = Kinetic Energy