एक वस्तु विराम अवस्था x = 0 मीटर और t = 0 s से शुरू होती है। यह x-अक्ष के साथ 2m/s2 के निरंतर त्वरण के साथ चलता है। 1 s और 5 s के बीच इसका औसत वेग क्या है?

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RRB ALP Electrician 22 Jan 2019 Official Paper (Shift 1)
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  1. 2 m/s
  2. 8 m/s
  3. 6 m/s
  4. 4 m/s

Answer (Detailed Solution Below)

Option 3 : 6 m/s
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Detailed Solution

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अवधारणा:

  • औसत वेग = कुल विस्थापन / कुल समय अवधि
  • गति का समीकरण:
  • v = u + at
  • v2 = u2 + 2as
  • s = ut + 1/2 at2

गणना:

दिया गया है:

समय अंतराल = 5 s और 1 s, प्रारंभिक वेग u = 0, और, त्वरण a = 2 m/s2

 

जब कोई वस्तु विरामवस्था से शुरू होती है, तो 1 सेकंड और 5 सेकंड में तय की गई कुल दूरी है,

s = ut + 1/2 at2

वस्तु विरामावस्था में है, इसलिए, u = 0 m/s.

\(s_2 - s_1 = \frac12 a(t_2^2-t_1^2)\)

\(s_2 - s_1 = \frac12 \times 2(5^2-1^2)\)

s2 - s1 = 24 m

लिया गया कुल समय, t = t2 - t1 = 5 - 1 = 4 सेकंड

औसत वेग = कुल विस्थापन / कुल समय अवधि

औसत वेग = 24/4 = 6 m/s

समय 1 s और 5 s के बीच औसत वेग = 6 m/s

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