एक वस्तु विराम अवस्था से x = 0 m से शुरू होती है और x-अक्ष के साथ 1.6 m/s2 के नियत त्वरण के साथ चलती है। इसकी यात्रा के दौरान x = 12.8 m से x = 20.0 m तक, इसका औसत वेग __________ होगा।

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  1. 7.2 m/s
  2. 3.6 m/s
  3. 8.8 m/s
  4. 2.4 m/s

Answer (Detailed Solution Below)

Option 1 : 7.2 m/s
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अवधारणा:

गति का समीकरण:

  • शुद्धगतिक की गति के समीकरण किसी वस्तु की गति की मूल अवधारणा का वर्णन करते हैं जैसे कि विभिन्न समय पर किसी वस्तु की स्थिति, वेग या त्वरण।
  • गति के ये तीन समीकरण किसी वस्तु की गति को 1D, 2D और 3D में नियंत्रित करते हैं।
  • तीन समीकरण: v = u + at, s = ut + 0.5 at2, 2as = v2 - u2
  • यहाँ, u = प्रारंभिक वेग, v = अंतिम वेग, s = विस्थापन, t = समय
  • गुरुत्वाकर्षण के प्रभाव में, त्वरण a को गुरुत्वाकर्षण g के कारण त्वरण से बदल दिया जाता है।

गणना:

Given,

Initial velocity, u = 0 m/s, Acceleration, a = 1.6 m/s2

From the second equation of motion,

s = ut +0.5 at2

12.8 = 0.8 t12

\(t^2=\frac{12.8}{0.8}=16\)

t1 = 4 sec.

For s = 20

20 = 0 × t2 + 0.5 × 1.6 t22

t2 = 5 sec.

The average velocity can be calculated as,

\(v_{avg}=\frac{total\, \, displacement}{total\, \, time\, duration}\)

\(v_{avg}=\frac{20 - 12.8}{5 - 4}=7.2m/s\)

Hence, What is its average velocity 7.2m/s.

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