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Chapter 13: Q. 7 (page 353)

Why is the gravitational potential energy of two masses negative? Note that saying 鈥渂ecause that鈥檚 what the equation gives鈥� is not an explanation.

Short Answer

Expert verified

If two masses are placed at infinite distance their Gravitational potential energy is Zero.

This means the negative potential energy has less potential energy than their potential energy at infinite separation.

Step by step solution

01

Given Information

Potential energy of two masses negative

02

Explanation

If two masses are placed at infinite distance their Gravitational potential energy is Zero.

This means the negative potential energy has less potential energy than their potential energy at infinite separation.

The gravitational potential energy is given by

U=Gm1m2r

When r approaches to infinity the value of potential energy approach to 0.

This means two masses infinitely far apart will have no tendency, or potential to move together.

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