# gravitational potential E

#### chiddler

##### Full Member
10+ Year Member
As some mass approaches a planet, what is the energy transformation that is occuring?

I think it would be gravitational potential energy being converted into kinetic energy.

I'm thinking of the numbers though. U = GMeMo/r. As radius, or the distance to the planet, decreases, the grav. pot. energy is increasing. Then the kinetic energy is increasing. Both are increasing!

So either my understanding is wrong, my math is wrong, or physics is wrong.

I really hope its the last one

thanks.

#### Dasypus

##### Full Member
[crawling out of corner] Gravitational potential energy is at 0 at infinity, and becomes more negative as you approach a mass. More negative = bigger number but decreasing. [/crawling out of corner]

#### chiddler

##### Full Member
10+ Year Member
[crawling out of corner] Gravitational potential energy is at 0 at infinity, and becomes more negative as you approach a mass. More negative = bigger number but decreasing. [/crawling out of corner]

lol

thanks. i forgot the negative sign.

#### MedPR

##### Membership Revoked
Removed
That pesky negative sign!

This thread is more than 9 years old.

Your message may be considered spam for the following reasons: