A heavenly body has its mass and radius half of the Earth's. If a stone weighs 100N on the Earth,find its weight on the heavenly body.?
回答 (2)
2015-08-02 10:45 am
✔ 最佳答案
See g = GM(e)/[R(e)]^2
now M= M(e)/2 and R = R(e)/2
g' = G*[M(e)/2]/[R(e)]^2/(4)
g' = 2GM(e)/[R(e)]^2
g' = 2g
g' = 20m/s^2
so mg' = 2mg = 200N Ans.
2015-08-02 12:30 pm
ge = Me*G/re^2
gb = Me/2*G*4/re^2
gb/ge = 4/2 = 2 = 19.6 m/sec^2
weight = 100*gb/ge = 200 N
gb = Me/2*G*4/re^2
gb/ge = 4/2 = 2 = 19.6 m/sec^2
weight = 100*gb/ge = 200 N
收錄日期: 2021-04-21 13:25:39
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20150802024042AAz7ZKB