Two objects have masses of $33$ $33$ $M g$ $Mg$ and $18$ $18$ $M g$ $Mg$ . How much does the gravitational potential energy between the objects change if the distance between them changes from $81$ $81$ $m$ $m$ to $3$ $3$ $m$ $m$ ?

Question

Two objects have masses of $33$ $33$ $M g$ $Mg$ and $18$ $18$ $M g$ $Mg$ . How much does the gravitational potential energy between the objects change if the distance between them changes from $81$ $81$ $m$ $m$ to $3$ $3$ $m$ $m$ ?

1 Answer

Impact of this question

1655 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2017-08-07T20:42:02

Use Newtons gravitational law for celestial bodies: $F = G \frac{m_{1} m_{2}}{r^{2}}$ $F = G(m_1 m_2) / r^2$ .

G is the gravitational constant, equaling 6.67408 × $10^{- 11} N \cdot \frac{m^{2}}{{(k g)}^{2}}$ $10^-11 N*m^2/(kg)^2$

The masses $m_{1}$ $m_1$ and $m_{2}$ $m_2$ are the masses you mentioned.

The $r^{2}$ $r^2$ is 3 respectively 81 meters. (It is mentioned as $r_{2}$ $r_2$ because it is meant to be a radius, which the same as the distance from the center of an object to the center of another)

Now calculate the forces at both distances, and substract.

Science

Math

Humanities

... and beyond

Two objects have masses of $33$ $33$ $M g$ $Mg$ and $18$ $18$ $M g$ $Mg$ . How much does the gravitational potential energy between the objects change if the distance between them changes from $81$ $81$ $m$ $m$ to $3$ $3$ $m$ $m$ ?

1 Answer

Related questions

Impact of this question

Science

Math

Humanities

... and beyond

Two objects have masses of 3333 MgMg and 1818 MgMg. How much does the gravitational potential energy between the objects change if the distance between them changes from 8181 m m to 33 mm?

1 Answer

Related questions

Impact of this question

Two objects have masses of $33$ $33$ $M g$ $Mg$ and $18$ $18$ $M g$ $Mg$ . How much does the gravitational potential energy between the objects change if the distance between them changes from $81$ $81$ $m$ $m$ to $3$ $3$ $m$ $m$ ?