Physical Movement Calculation

Kepler's third law: Kepler's third law of planetary motion, also known as the periodic law, refers to all planets orbiting an elliptical orbit with the sun as the focus, and the cubes of the semi-major axis of the elliptical orbit. The ratio of the square of the period is a constant. Often used in the calculation of elliptical orbits.

Vertically thrown: It is the initial velocity of the object with vertical upward acceleration, and the acceleration is always uniform acceleration of g, which can be divided into two processes of uniform deceleration motion and falling freefall motion. It is equal to the time taken for the process of rising and falling during the synthesis of the uniform linear motion of the initial velocity of Vo and the free fall motion.

Newton's second law: the magnitude of an object's acceleration is proportional to the force the object is subjected to, and inversely proportional to the mass of the object. The direction of the acceleration is the same as the direction of the external force. From a physics point of view, the second law of Newtonian motion can also be expressed as "the momentum change rate of an object changes with time is proportional to the sum of the external forces received", that is, the first derivative of momentum versus time is equal to the sum of external forces.

Peripheral linear velocity motion: The speed of a circular motion can be measured by the ratio of the arc length through which the object passes and the time used. Line velocity is a vector, with size and direction, an object that makes a circular motion, its linear velocity direction changes momentarily, and always points to the tangent direction of the point.