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Q.

The radius of the earth is about 6400 km and that of Mars is about 3200 km The mass of the earth is about 10 times the mass of Mars. An object weigh 200N on the surface of the earth. Its weight on the surface of mars would be

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a

20 N

b

6 N

c

80 N

d

40 N

answer is D.

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Detailed Solution

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g=GMR2 ; W=mg g1=GM10R22=410g=0.4g W1=mg1=0.4mg=80 N

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The radius of the earth is about 6400 km and that of Mars is about 3200 km The mass of the earth is about 10 times the mass of Mars. An object weigh 200N on the surface of the earth. Its weight on the surface of mars would be