पृथ्वीच्या (वस्तुमान M आणि त्रिज्या R) पृष्ठभागावरील गुरुत्वीय त्वरण _________ शी समानुपाती असते.

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RRB ALP CBT I 17 Aug 2018 Shift 3 Official Paper
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Answer (Detailed Solution Below)

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योग्य उत्तर  M/R2 आहे.

Key Points

  • गुरुत्वाकर्षणामुळे वस्तूवर कार्य करणारे बल f = mg द्वारे दिले जाते.
  • जिथे f हे वस्तूवर कार्य करणारे बल आहे, g हे गुरुत्वीय त्वरण आहे आणि m हे वस्तुचे वस्तुमान आहे.
  • सार्वत्रिक गुरुत्वाकर्षणाच्या नियमानुसार,
  • f = GmM/(r+h)2.
  • जिथे,
  • f = दोन वस्तूंमधील बल,
  • G = सार्वत्रिक गुरुत्व स्थिरांक (6.67×10-11 Nm2/kg2)
  • m = वस्तूचे वस्तुमान,
  • M = पृथ्वीचे वस्तुमान,
  • r = पृथ्वीची त्रिज्या.
  • h = पृथ्वीच्या पृष्ठभागापासून वस्तूची उंची.
  • पृथ्वीच्या त्रिज्येच्या सापेक्ष उंची (h) नगण्य असल्याने, आपण खालीलप्रमाणे समीकरण पुनरावृत्ती करतो,                             
  • f = GmM/r2
  • आता दोन्ही पदावली संतुलित करा,
  • mg = GmM/r2
  • ⇒ g = GM /r2
  • म्हणून, गुरुत्वीय त्वरणाचे सूत्र g = GM/r2 द्वारे दिले जाते

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