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Using the estimated values, compute the estimated force of gravitional attraction...

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quddoos | Valedictorian

Posted August 10, 2013 at 10:17 AM via web

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Using the estimated values, compute the estimated force of gravitional attraction between two cows, showing calculations.

Asssuming that g=10m/s^2, what would you determine the gravitational force between the two cows to be? Estimate and list in SI values for the quantities you would need to know.

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llltkl | College Teacher | Valedictorian

Posted August 11, 2013 at 1:52 PM (Answer #1)

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Mass of cow(1) is 300 kg

Mass of cow(2) is 240 kg.

The cows are kept 30 meters apart from each other at the surface of Earth.

In order to calculate the gravitational force of attraction between the two cows, their weights must be converted to units of mass. That means dividing each weight by g, 10 m/s2.

Thus, the mass of cow(1) is:

`M_1= 300/10 =30` kg-mass

The mass of cow(2) is:

`M_2= 240/10=24` kg-mass

Substituting the values into the equation for gravitational force, we get:

`F = G(Mm)/R^2`

`F= (6.673*10^-11)((30)(24))/30^2 N `

`=5.34*10^-11 N`

This is indeed a very small force.

Hence the force of gravitional attraction between two cows kept 30 m apart is `5.34*10^-11 N` .

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