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বাংলা
In circular motion, if the radius increases, centripetal force will:
বৃত্তীয় গতিতে যদি ব্যাসার্ধ বৃদ্ধি পায়, তবে অভিকেন্দ্র বল কী হবে?
Practice MCQ for SSC, UPSC, RRB Exams
A. Increase
A. বৃদ্ধি পাবে
B. Decrease
B. হ্রাস পাবে
C. Remain same
C. একই থাকবে
D. Become zero
D. শূন্য হয়ে যাবে
Correct Answer: B
সঠিক উত্তর: B
Explanation
ব্যাখ্যা
The force required to keep a body moving in a circular path is called
centripetal force
.
The formula of centripetal force is:
\(F_c=\dfrac{mv^2}{r}\)
Where:
\(m\) = mass of the object
\(v\) = speed of the object
\(r\) = radius of the circular path
If mass and speed remain constant:
\(F_c\propto\dfrac{1}{r}\)
Therefore, when the radius increases, the centripetal force decreases.
Important:
Centripetal force is inversely proportional to the radius of the circular path (when speed is constant).
কোনো বস্তুকে বৃত্তাকার পথে চলমান রাখার জন্য যে বল প্রয়োজন তাকে
কেন্দ্রাভিমুখী বা অভিকেন্দ্র বল (Centripetal Force)
বলে।
অভিকেন্দ্র বলের সূত্র:
\(F_c=\dfrac{mv^2}{r}\)
যেখানে:
\(m\) = বস্তুর ভর
\(v\) = বস্তুর দ্রুতি
\(r\) = বৃত্তাকার পথের ব্যাসার্ধ
যদি ভর ও দ্রুতি অপরিবর্তিত থাকে:
\(F_c\propto\dfrac{1}{r}\)
অতএব, ব্যাসার্ধ বৃদ্ধি পেলে অভিকেন্দ্র বল হ্রাস পায়।
গুরুত্বপূর্ণ:
দ্রুতি ধ্রুব থাকলে অভিকেন্দ্র বল ব্যাসার্ধের ব্যস্তানুপাতিক।
Related Questions
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