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Consider my example below. Example: 1. A man standing on grass(point) on earth surface. 2. He jumped. 3. And returned back, and he could find the same grass(point) under his foots. Right?

If earth is spinning, when he is on air (on jump) and return back to the earth surface, the grass(point) should be moved right or left side based on rotating direction of earth Right. But it did not happen on real scenario.

Newton told that as "Gravity". and the definition would be the force that attracts a body towards the centre of the earth, or towards any other physical body having mass.

But from my example the man attaching with a earth surface by some force due to not only of earth's massive body, but also for it's spinning.

Because If gravity only about to mass means the man return back to earth surface is OK, but how could he feel like settle down on same place on earth surface that he stood before he jumps.

I am really curious about the answer.

Qmechanic
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Saravanan
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1 Answers1

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What you have to realize is, both the man and the ground beneath him are travelling at the same speed. What that means is, yes, the ground underneath the man is travelling east very quickly, but the man is also travelling east just as quickly.

The gravitational force causes the man to come back down, but it has nothing to do with making sure he stays over the same point on the earth's surface. He will ALREADY stay over the same patch of earth, due to his speed eastward.

Jahan Claes
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