Период колебаний частота колебаний заранее .

Период колеба́ний  — наименьший промежуток времени, за которое совершается одно полное колебание (то есть возвращается в то же состояние, в котором он находился в первоначальный момент, выбранный ) частота - сколько колебаний за ед времени (шт/время)

1)   s = p/p           s = 960н/5*10^3па = 0,192м^2

2)   p = ps           p = 400*10^3па * 0,12м^2 = 48кн

3) 1 способ уменьшить p         2 способ   увеличить s

4)   f = ps       s = 5*10 =50м^2             f = 1000па * 5м * 10м = 50кн

5)   встать на одну ногу

6) p = f/s       f = mg       m = po*v

p = po*v*g/s                     p = 1000 * 0,0039 * 10/0,13 = 300па

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