Фізика 9. Розв'язування задач «Рух тіла під дією кількох сил» (3 задачі)

Physics 9th grade. Presentation for lesson 77 on solving problems on the topic "Motion of a body under the action of several forces". Distance learning: Physics -   / physics.ukr   The purpose of the lesson: to consolidate knowledge on the topic "Motion of a body under the action of several forces", to continue to form skills and abilities to solve physical problems, applying the knowledge gained. Expected results: students must be able to solve problems of different types on the topic "Motion of a body under the action of several forces". Online lesson for distance learning from the project "Physics Online". Based on the book "Physics 9" edited by V. G. Baryakhtar, S. O. Dovhy. Online lesson for distance learning from the project "Physics Online". The video was created based on educational materials from the website PHYSICS NOVA https://www.fizikanova.com.ua with the permission of the authors. If you liked it, don't forget to like, subscribe and share the video with those who might also be interested in it. 00:00 Problem solving lesson on the topic "Motion of a body under the action of several forces" 00:13 A body with a mass of 3 kg falls in the air with an acceleration of 8 m/s^2. Determine the force of air resistance. 10:38 A load with a mass of 10 kg and a volume of 1 dm3 is pulled out of water using a rope. Determine the tension force of the rope if the load moves with an acceleration of 2 m/s^2. Neglect water resistance. 24:52 A person with a mass of 70 kg got into an elevator. The elevator starts moving with an acceleration of 0.2 m/s^2 directed upwards, and then rises at a constant speed. How much does the person's weight change during this movement?