JEE Mains · Physics · STD 11 - Gravitation
- JEE Mains 2020
- Medium
- MCQ
A box weighs \(196 \;\mathrm{N}\) on a spring balance at the north pole. Its weight recorded on the same balance if it is shifted to the equator is close to ....... \(N\) (Take \(\mathrm{g}=10\; \mathrm{ms}^{-2}\) at the north pole and the radius of the earth \(=6400\; \mathrm{km}\))
Pick an option to check your answer.
Answer & Solution
Correct Answer
(D) \(195.32\)
Step-by-step Solution
Detailed explanation
at equater\(\mathrm{W}=mg-\mathrm{m} \omega^{2} \mathrm{R}\)
\(=196-(19.6)\left[\frac{2 \pi}{24 \times 3600}\right]^{2} \times 6400 \times 10^{3}\)
\(=195.33 \mathrm{N}\)
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