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ID#5744 HSC Physics 1st MCQ (Sylhet 2025)

একটি গ্রহের R' = 2R এবং g' = 8g হলে উক্ত গ্রহের মুক্তিবেগ কত?
ক) 4.48 x 10⁻³ m/s
খ) 4.48 x 10³ m/s
গ) 4.48 x 10³ cm/s
ঘ) 44.8 x 10³ m/s

ব্যাখ্যা

$v_e = \sqrt{2g'R'} = \sqrt{2 \times (8 \times 9.8) \times (2 \times 6.4 \times 10^6)}$
$v_e = \sqrt{16 \times 2 \times 9.8 \times 6.4 \times 10^6} \approx 44733 m/s = 44.8 \times 10^3 m/s$।
Resource Details
Exam HSC
Subject Physics 1st paper
Chapter 6
Board Sylhet
Year 2025

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