13-14 Newton’s Law of Gravity The gravitational force (in Newton) between two objects with mass and (in kg), separated by the distance (in meters) is given by Newton’s Law of Gravity,
14 The sun and the earth are apart, with masses and , respectively.
(a) Find the gravitational force between the sun and the earth.
(b) Convert your answer in part(a) from Newton to pounds using the fact that .
The gravitational force between the satellites.
The distance between the Sun and Earth is .
The mass of the Sun is .
The mass of the Earth is .
The formula for gravitational force is,
Here, is the gravitational force, is the gravitational constant with value , and are the masses of the objects and is the distance between the objects.
The significant figures in a number are one from first nonzero digit to the last nonzero digit when reading from left to right.
When multiplying or dividing, round off the final result so that it has as many as significant digits as in the given values with the fewest number of significant digits.
Substitute for and for ,
The answer obtained in part in pounds.
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