Искусственный спутник вращается по круговой орбите на высоте 600 км от поверхности планеты со скоростью 3, 4 км/с.радиус планеты равен 3400 км, ускорение свободного падения на поверхности планеты равно 4 км/с2.чему равна скорость движения спутника на орбите ?

Т.к. спутник вращается по круговой орбите, то он вращается с 1 космической скоростью:

R = R+600=4000 км = 4*10^6 м

g=v1^2/R=(3.4*10^3)^2/4*10^6=2.89 м/с^2.

ответ: 2.89 м/c^2/

PS ОТМЕТЬ КАК ЛУЧШИЙ

Реально Мухтар будет двигаться по окружности с радиусом м

А в идеале радиус этой окружности может быть 50-15=35м

 

Тогда длины этих окружностей будут:

реал: 39,39*6,28=347,37м

идеал: 35*6,28=219,8м

 

Скорость собаки 22,6км/ч=22,6(1000м/3600с)=6,28м/с

 

Тогда время будет:

реал: 347,37/6,28=55с

идеал: 219,8/6,28=35с

 

В принципе идеальный случай мозможен при условии, собака бежит уже не первый круг и соответственно разогнала цепь до такой же угловой скорости, с которой бежит сама.

Так что в ответ можно записать 35с

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          Q=c*m*t=500*20*80=800кДж