5000 kg/m3 घनतेच्या आणि 10.8 N वजनाच्या धातूच्या तुकड्याचे घनफळ (सेमी3 मध्ये) शोधा. (g = 10 m/s2  वापरा) 

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RRB ALP Fitter 21 Jan 2019 Official Paper (Shift 2)
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  1. 216
  2. 21.6
  3. 54
  4. 540

Answer (Detailed Solution Below)

Option 1 : 216
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संकल्पना:

वजन: 

  • हे गुरुत्वाकर्षण बल आहे जे वस्तूला पृथ्वीच्या केंद्राकडे आकर्षित करते.
  • याचे एकक न्यूटन (N) आहे.

जिथे, W = वस्तूचे वजन, m = वस्तूचे वस्तुमान, g = गुरुत्वीय त्वरण.

घनता: 

  • एका वस्तूच्या वस्तुमानाचे तिच्या घनाशी असलेले गुणोत्तर अशी त्याची व्याख्या केली जाते.
  • याचे एकक kg/m3 आहे.

जिथे,  = घनता, m = वस्तुमान, v = घन

गणना:

दिलेल्याप्रमाणे:

धातूची घनता, ρ = 5000 kg/m3

वजन, W = 10.8 N

g = 10 m/s2

आता, वजन (W) = mg

जिथे, m धातूचे वस्तुमान आहे

 = 1.08 किलो

तर, 

घन (v) = 0.000216 मिटर3 = 216 सेमी3

म्हणून, पर्याय (1) योग्य उत्तर आहे.

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