How many sig figs does 0.009 have?
1 answer:
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Answer:
The correct answer is c.) the force of the stone's gravity pulling up on Earth.
Explanation:
The correct answer is c.) the force of the stone's gravity pulling up on Earth.
The Earth's size is much greater than size of the stone.
From Newton's Third Law that the force with the Earth attracts the stone is the same as the force of gravitational attraction that the stone exerts on Earth.
Let be the mass of Earth and
be the mass of the stone.
Therefore F = =
where it is known that
which implies that
.
The acceleration of the stone towards the Earth is much greater than the acceleration of the Earth towards the stone, and so the stone falling towards the Earth is actually visible and perceptible.