A box weights $$196 N$$ 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 (Take $$g = 10 ms^{-2}$$ at the north pole and the radius of the earth $$= 6400 km$$):
A
$$195.66 N$$
B
$$194.32 N$$
C
$$195.32 N$$
D
$$194.66 N$$
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Correct option is C. $$195.32 N$$ Weight of box measured at north pole $$\Rightarrow $$
A 3 kg stone is weighed first at equator, then it is taken to the north pole. The weight measured by the spring balance will be
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Q2
A body weighs 49N on a spring balance at the North Pole. What will be its weight recorded on the same weighing machine, if it is shifted to the equator?
[Use, g=GMR2=9.8m/s2 and radius of earth, R=6400km]
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Q3
Francium (the most expansive element) costs $1 billion for 1 g. Shyam bought 10 g on the north pole and sold it to Nairobi at the equator using the same spring balance. Find the profit or loss sustained by Shyam. (Radius of Earth at equator is 1.003 times the radius of Earth at poles.) (3 marks)
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Q4
A body weighs 98N on a spring balance at the north pole . What will be its weight recorded on the same scale if it shifted to the equator? Use GM/R^2 = 9.8 m/s and the radius of the earth is R=6400km
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Q5
A body weighs 1 kg by a spring balance at the north pole. What will it weight at the equator?