Из-за притяжения Земли тело давит на опору, она деформируется и действует на тело с силой N - реакцией опоры. При горизонтальном прямолинейном движении N=mg.
The fireman is a very interesting and dangerous profession.when the fireman helping people, he risks his life.this people must have good physical parameters.and he must be brave and don't afraid come in the burning house. this profession very intense because for fireman depending life of the peoples,therefore he must be responsible and was good reaction.as this profession was a good paying maybe this is one of its pluses. the firemans was respecting and considering a hero.they was authority at many people
Pushkin's poems, the girl's voice, the new workers' club, the pete's letter, my parents' car, the woman's life, the women's handbags, my sister's flat is large, my brother's children are at home, the boys' room is large, this girl's name is jane, the students' work is interesting.
Дано: m=3 кг; μ=0,2; Fтр - ?
Из-за притяжения Земли тело давит на опору, она деформируется и действует на тело с силой N - реакцией опоры. При горизонтальном прямолинейном движении N=mg.
Fтр=μ*N=μ*mg=0,2*3*10=6 H - это ответ.