While Spider-man was swinging in the streets, MJ was troubled with the following thought: Earth takes 365 days to complete one revolution around the Sun. What if the distance between Earth and Sun was reduced to half the present distance?
She was hinted with the idea of the Universal Law of Gravitation and Kepler’s laws by Ned. Help her to understand the concept and find the new revolution period of Earth around the Sun without changing any other quantity.
When Ned was walking back, she got a new thought. Ned weighs 120 kg on Earth. But, how do we measure that he is really 120 kg? Does this change if Ned travelled to Venus or Mars?
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Yes the weight of ned will change because g is different on differnt celestial bodies
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