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Консультация № 196307
04.09.2019, 13:54
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1
Здравствуйте! У меня возникли сложности с таким вопросом:
Ускорение свободного падения на поверхности некоторой планеты, средняя плотность которой в 4 раза меньше средней плотности Земли, а радиус в 2 раза больше земного:
1) в 2 раза больше, чем ускорение свободного падения на поверхности Земли
2) в 4 раза больше, чем ускорение свободного падения на поверхности Земли
3) в 2 раза меньше, чем ускорение свободного падения на поверхности Земли
4) в 4 раза меньше, чем ускорение свободного падения на поверхности Земли
Ускорение свободного падения на поверхности некоторой планеты, средняя плотность которой в 4 раза меньше средней плотности Земли, а радиус в 2 раза больше земного:
1) в 2 раза больше, чем ускорение свободного падения на поверхности Земли
2) в 4 раза больше, чем ускорение свободного падения на поверхности Земли
3) в 2 раза меньше, чем ускорение свободного падения на поверхности Земли
4) в 4 раза меньше, чем ускорение свободного падения на поверхности Земли
Обсуждение
06.09.2019, 10:23
общий
это ответ
Здравствуйте, dar777!
Ускорение
свободного падения на поверхности Земли связано с гравитационной постоянной 
массой 
Земли и радиусом 
Земли соотношением [1, с. 40]
Масса Земли равна произведению её средней плотности
на объём 
[2, с. 44], который, принимая Землю за шар, равен 
[3, с. 18]. Если средняя плотность 
планеты в четыре раза меньше плотности Земли, а радиус 
в два раза больше земного, то масса 
этой планеты составляет
а ускорение
свободного падения
то есть ускорение свободного падения на поверхности этой планеты в два раза меньше, чем ускорение свободного падения на поверхности Земли.
Литература
1. Аксенович Л. А., Ракина Н. Н., Фарино К. С. Физика в средней школе. -- Минск: Адукацыя i выхаванне, 2004. -- 720 с.
2. Яворский Б. М., Селезнёв Ю. А. Справочное руководство по физике для поступающих в вузы и для самообразования. -- М.: Наука, 1989. -- 576 с.
3. Цыпкин А. Г., Цыпкин Г. Г. Математические формулы. -- М.: Наука, 1985. -- 128 с.
Ускорение
свободного падения на поверхности Земли связано с гравитационной постоянной массой Земли и радиусом Земли соотношением [1, с. 40]Масса Земли равна произведению её средней плотности
на объём [2, с. 44], который, принимая Землю за шар, равен [3, с. 18]. Если средняя плотность планеты в четыре раза меньше плотности Земли, а радиус в два раза больше земного, то масса этой планеты составляета ускорение
свободного падениято есть ускорение свободного падения на поверхности этой планеты в два раза меньше, чем ускорение свободного падения на поверхности Земли.
Литература
1. Аксенович Л. А., Ракина Н. Н., Фарино К. С. Физика в средней школе. -- Минск: Адукацыя i выхаванне, 2004. -- 720 с.
2. Яворский Б. М., Селезнёв Ю. А. Справочное руководство по физике для поступающих в вузы и для самообразования. -- М.: Наука, 1989. -- 576 с.
3. Цыпкин А. Г., Цыпкин Г. Г. Математические формулы. -- М.: Наука, 1985. -- 128 с.
5
Это самое лучшее решение!
Об авторе:
Facta loquuntur.
Facta loquuntur.
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