1.
GMm/R^2=m(2派/T)^2×R,直接求解就行
2.
能量守恒:牵引力做功减去摩擦力做功等于动能增加:
FS - fS = 1/2mv^2
牵引力F = f + 1/2mv^2/S = 0.2mg+ mv^2/(2S) = m [ 0.2g+ v^2/(2S)]
= 5 * 10^3 * [ 0.2 * 9.8 + 60^2 /(2*530)]
≈ 26781N
1.
GMm/R^2=m(2派/T)^2×R,直接求解就行
2.
能量守恒:牵引力做功减去摩擦力做功等于动能增加:
FS - fS = 1/2mv^2
牵引力F = f + 1/2mv^2/S = 0.2mg+ mv^2/(2S) = m [ 0.2g+ v^2/(2S)]
= 5 * 10^3 * [ 0.2 * 9.8 + 60^2 /(2*530)]
≈ 26781N