Yerning turli joylaridagi erkin tushish tezlanishi
Erkin tushish tezlanishi g ning qiymati - joyning geografik kengligi - φ , bu joyning dengiz sathidan balandligi - h larning qiymatlairiga uzviy bog‘liq. Dengiz sathida g ning φ ga bog‘liqligi quyidagi formula orqali ifodalanadi: gφ=978.049 (1+0.005288sin2φ – 0.000006sin2φ) {1}, g ning h ga bog‘iqligi esa, gh=g0–0.0003086h* {2}formuladan aniqlanadi. Bu yerda g0dengiz sathidagi erkin tushish tezlanishi (sm/s2), h- joyning balandligi (metr).
Jadvalda 1° intervallar oralab turli geografik kengliklar uchun {1} formula orqali keltirib chiqarilgan g ning qiymatlari, va g ning dunyodagi ba'zi shaharlar uchun qiymatlari keltirilgan. Pastdagi jadval uchun geografik koordinatalari: φ - shaharning geografik kengligi, λ - geografik uzunligi. "sh" va "g‘" harflari esa shaharning Grinvich meridianidan sharq yoki g'arbda ekanligini bildiradi. ("sharqiy" yoki "garbiy" uzunlik)
Keng-lik, |
Graduslar |
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0 |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
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g, sm/soniya2 |
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0 |
978.049 |
978.051 |
978.055 |
978.063 |
978.074 |
978.088 |
978.105 |
978.125 |
978.149 |
978.175 |
10 |
978.204 |
978.237 |
978.272 |
978.31 |
978.35 |
978.394 |
978.44 |
978.489 |
978.541 |
978.595 |
20 |
978.652 |
978.711 |
978.772 |
978.836 |
978.902 |
978.969 |
979.039 |
979.111 |
979.185 |
979.261 |
30 |
979.339 |
979.417 |
979.497 |
979.578 |
979.661 |
979.746 |
979.831 |
979.917 |
980.004 |
980.092 |
40 |
980.18 |
980.27 |
980.359 |
980.449 |
980.539 |
980.629 |
980.72 |
980.81 |
980.9 |
980.989 |
50 |
981.079 |
981.167 |
981.255 |
981.343 |
981.429 |
981.515 |
981.599 |
981.682 |
981.764 |
981.845 |
60 |
981.924 |
982.001 |
982.077 |
982.151 |
982.224 |
982.294 |
982.362 |
982.429 |
982.493 |
982.554 |
70 |
982.614 |
982.671 |
982.725 |
982.777 |
982.827 |
982.873 |
982.917 |
982.958 |
982.997 |
983.032 |
80 |
983.065 |
983.094 |
983.121 |
983.144 |
983.165 |
983.182 |
983.196 |
983.207 |
983.215 |
983.200 |
90 |
983.221 |
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* {2} formula dengiz sathidan birnecha yuz kilometrlargacha "o'rinli bo'lib qoladi. Bundan kelib chiqadiki, erkin tushish tezlanishi har 1 metrga ko'tarilishda 3 mkm/soniya2ga kamayar ekan.
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