Fotoenergetikada nanostrukturali yarimo‘tkazgich materiallar II xalqaro ilmiy anjumani

Fotoenergetikada nanostrukturali yarimo‘tkazgich materiallar

II xalqaro ilmiy anjumani 
 
19-20 noyabr 2021 yil 
488 
the school physics laboratory. Because students have to observe the experiments 
and interpret new concepts based on the conclusions from them. In the school 
physics course, the use of such laboratory stands is necessary for the formation of 
concepts in students based on visual perception. 
One of the interesting phenomena in nature is the plane rotational motion 
performed by a solid body, the laws of motion of which are studied in the 
mechanics section of the physics course. The knowledge and use of the laws of the 
rotational motion of a solid body is important, since it has found its application in 
the electronic industry, space and marine shipbuilding, as well as in many technical 
problems of the national economy. There are a large number of different types of 
experimental problems that simulate phenomena occurring in or near various 
rotating aggregates. When setting up such experiments, it is important to choose a 
way to describe the rotation in the selected model, which will be correct from the 
point of view of physics. 
Any complex motion of an absolutely rigid body (i.e., a body whose points 
all remain in the same position relative to each other) can be represented as a set of 
simple movements: translational and rotational. In translational motion, the 
displacement of all points of the body for any period of time is the same, therefore, 
all points of the body have the same velocities and accelerations at a given time. 
The rotation of the body is characterized by angular velocity and angular 
acceleration. The reason that causes the rotational movement of the body is the 
presence of moments of forces acting on the body. 
A body performing a rotational motion has one degree of freedom, and its 
position relative to a given frame of reference is determined by the angle of 
rotation φ between the stationary half-plane and the half-plane rigidly connected to 
the body, drawn through the axis of rotation. 
The angular velocity characterizes the change in the angle of rotation of the 
body. At a given time, it is expressed as the first derivative of the rotation angle in 
time:
ω = 
= 2π
v
= 
[рад/с, 1/с, с 

1
] 
Speed of rotation — the number of revolutions per unit of time: 
2π
v
= = 
The relationship between the angular velocity ω and the number of 
revolutions per minute n [rpm]. The relationship between the angular velocity and 
the number of revolutions is expressed by the formula:
ω = 2πn 
When rotating, the arc length is: 
S = ωR 
where R is the radius of rotation of the points of the body. 
Point speeds: 

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