Abslyut nol harorat

The average scalar (mean ground) speed is a physical quantity determined by the ratio of the path traversed by a point in a period of time to the duration of this interval.
Acceleration (instantaneous acceleration) of a material point at a time instant is a physical quantity a, equal to the limit to which the average acceleration tends for a time interval from t to t + Δt with unlimited reduction Δt.
A free fall is a movement that would make a body only under the influence of gravity without taking into account the resistance of the air.
The average angular velocity of a point along a circle around a given center (or axis) is a quantity equal to the ratio of the angle of rotation of the radius vector of the point in the interval of time to the duration of this interval.
The angular velocity - (the instantaneous angular velocity) ω is the limit to which the mean angular velocity tends to tend with an infinite decrease in the time interval.
The period of revolution (period of rotation) is the time interval T, during which the point makes one complete revolution along the circumference. The reciprocal of the period is called the frequency of revolution (the frequency of rotation).
The angular acceleration (instantaneous angular acceleration) of a rotating body at a time instant is the value of e, equal to the limit to which the average angular acceleration tends over the time interval from t to t + Δt with infinite decrease Δt. As the angular velocity of the body increases, the rotational motion is called accelerated motion, and when the angular velocity decreases, it is called slow motion.
The main task of dynamics is to determine the position of the body at an arbitrary moment in time from the known initial position of the body, the initial velocity and the forces acting on the body.
A free (isolated) body is a body that is not affected by any other body or field.
Newton's first law: any material point preserves a state of rest or uniform rectilinear motion, until external influences change this state.