Предмет: Физика, автор: diisannn

Вариант 3
4. Пружина жесткостью 120Н/м растянулась на 5см. Определить силу упругости.
5. Сани массой 300кг движутся по снегу, коэффициент действия которого 0,055. Найти
модуль силы трения.

Ответы

Автор ответа: zinovicgrigorij

0

Ответ: 6Н; 165Н

Объяснение:

Дано:

k=120Н/м

х=5см=0,05м

---------------------

F-?

F=kx=120*0,05=6Н

Дано:

m=300кг

μ=0,055

---------------

Fтр-?

Fтр=mgμ=300*10*0,055=165Н

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Tatyana Tarasova
There are few people in this country who don’t know this fantastic woman and great trainer. Tatyana Tarasova has trained more world and Olympic champions than anybody else in skating history. Her students have won about half a hundred gold and a lot of silver and bronze medals at the European and world competitions. Eleven of her students have become Olympic champions. We have seen them on the podium crying or laughing with joy after their victories.
Tatyana is the daughter of Anatoly Tarasov, a famous ice hockey trainer. For his daughter he has always been an example of a person who gave all his life t sport. She began to do figure skating at the age of five but had to end her career of a skater when she was 18 because of a trauma. A year later she started training young athletes. A lot of her students have become really famous like Irina Rodnina or Alexei Yagudin.
For more than a decade Tatyana lived and worked in Connecticut, USA because in the 1990s there were big problems with stadiums and sports equipment in Russia. She is sure that if a sportsman or a sportswoman stops training, it puts an end to his or her career. That’s why she did what she could to keep Russian figure skaters in good form for the future of Russian national figure skating.
In 2006 Tatyana Tarasova returned to Russia. Here she started a number of interesting new projects which have become popular with the spectators. Tatyana knows everything about figure skating. Every little detail is important to her: what athletes wear when they come onto the ice, to what music they are skating, where and how they prepare for a competition or a show. She loves her students and believes them. It’s a great honour for every skater to win her smile or her kind words, which are the best prize they can get.

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