Question

Выберите случаи, где действуют три закона классической механики Ньютона. 1 Движение легкоатлетов по беговой дорожке2Перемещегие самолёта из Москвы во Владивосток3Движение снарядпюа после выстрела из пушки4Движение электронов вокруг ядра атомовПОМОГИТЕ, ПОЖАЛУЙСТА

Answer 1

Ответ1,3,4

Объяснение:по данным закона Ньютона

Answer 2

Cases where Newton's Laws of Classical Mechanics apply:

1. Movement of athletes on a running track: The motion of athletes on a running track can be described using Newton's Laws of Classical Mechanics. The first law states that an object at rest will remain at rest, and an object in motion will continue moving with a constant velocity unless acted upon by an external force. When athletes start running, they apply a force to overcome inertia and accelerate their bodies. The second law states that the acceleration of an object is directly proportional to the net force applied to it and inversely proportional to its mass. In this case, the athletes' acceleration depends on the force they apply and their mass. Finally, the third law states that for every action, there is an equal and opposite reaction. When athletes push against the ground, the ground exerts an equal and opposite force, propelling them forward [[1]].

2. Airplane travel from Moscow to Vladivostok: The movement of an airplane from Moscow to Vladivostok can also be analyzed using Newton's Laws of Classical Mechanics. The first law applies here as well, as the airplane will continue moving at a constant velocity unless acted upon by external forces like air resistance or changes in engine thrust. The second law is relevant when considering the forces acting on the airplane during takeoff, flight, and landing. The thrust generated by the engines, the lift produced by the wings, the drag caused by air resistance, and the weight of the airplane all interact to determine the airplane's motion. The third law is also applicable, as the engines push air backward, creating a forward force that propels the airplane forward [[2]].

3. Projectile motion after firing from a cannon: When a projectile, such as a cannonball, is fired from a cannon, its motion can be analyzed using Newton's Laws of Classical Mechanics. The first law applies before the cannonball is fired, as it remains at rest until the explosion in the cannon propels it forward. The second law is relevant during the projectile's flight, as the force of gravity acts on it, causing it to accelerate downward. The horizontal motion of the projectile is not affected by gravity, assuming no air resistance, and follows a constant velocity. The third law is also applicable, as the cannon exerts a force on the cannonball, and the cannonball exerts an equal and opposite force on the cannon [[3]].

4. Electron motion around the nucleus of an atom: The motion of electrons around the nucleus of an atom can be described using Newton's Laws of Classical Mechanics. The first law applies to the electrons' motion, as they continue moving in their orbits unless acted upon by external forces. The second law is relevant when considering the forces acting on the electrons due to the electrostatic attraction between the negatively charged electrons and the positively charged nucleus. The third law is also applicable, as the electrons exert a force on the nucleus, and the nucleus exerts an equal and opposite force on the electrons [[4]].

In all these cases, Newton's Laws of Classical Mechanics provide a framework for understanding and predicting the motion of objects in various scenarios.