К одному плечу рычага подвешен груз весом 4400 Н. При равномерном поднятии его на 0,44 м к другому плечу приложили силу 500 Н, при этом точка приложения силы переместилось на 2 м.
A) Определите полную работу Аполная (записать формулу и вычислить).
В) Определите полезную работу Аполезная (записать формулу и вычислить).
С) Определите КПД наклонной доски (записать формулу и вычислить в
I came to the kitchen where I met my mother. We said "Good morning" to each other. Then I started to cook my breakfast. After I cooked and ate my cereal, I got ready for school.
School routine wasn't so hard that day. Every lesson was very easy, teachers didn't asked us too much, me and my classmates were very relaxed. I came back from school in a very good mood.
After school I was going to the cinema with my friends but the first I decided to clean my room. As I was done with my work, I called my friend to ask about our plans on that evening. In a few hours we had already been in the cinema. After we watched a movie, we came to the cafe. We were discussing the movie for two hours.
I came home at 7 p.m. My mother invited me to dinner but I was fed. We told each other how was the day and shared impressions.