1 কেজি ভরের একটি বস্তু 10 মি/সেকেন্ড বেগে চলছে। বস্তুর গতিশক্তি নির্ণয় করুন?

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RRB ALP Electrician 22 Jan 2019 Official Paper (Shift 1)
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  1. 5 জুল
  2. 100 জুল
  3. 10 জুল
  4. 50 জুল

Answer (Detailed Solution Below)

Option 4 : 50 জুল
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ধারণা:

গতিশক্তি (K.E):

  • গতির কারণে বস্তুর যে শক্তি থাকে তাকে গতিশক্তি বলে।
  • গতিশক্তির অভিব্যক্তি হল

\(KE = \frac{1}{2}m{v^2}\)

যেখানে m = বস্তুর ভর এবং v = বস্তুর বেগ

গণনা:

প্রদত্ত:

ভর (মি) = 1 কেজি।

বেগ (v) = 10 m/s.

গতিশক্তির সমীকরণ দেওয়া হয়,

গতিশক্তি = \({1 \over 2}\times {m \times v^2}\)

\(Kinetic Energy= {1\over2}\times{1 \times 10^2}={100\over2}=50 J\)

∴ বস্তুর গতিশক্তি 50 জুল

সঠিক উত্তরটি হল বিকল্প 4 

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