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rudransh verma

Gold Member

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1.One can now see why all bodies fall at same rate:

2.Law of gravitation predicts the orbit of planets, moon ,earth with great accuracy.

please explain the line in bold

**A body of twice the weight will have twice the force of gravity pulling it down, but it will also have twice the mass.**According to Newton’s second law these two effects will exactly cancel each other, so the acceleration will be same in all cases.2.Law of gravitation predicts the orbit of planets, moon ,earth with great accuracy.

**If the law were that the gravitational attraction of a star went down faster with distance, the orbits of the planets would not be elliptical, they would spiral into the sun.**If it went down slower the gravitational force from distant star would dominate over that of the earth.please explain the line in bold

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