{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Force Laws - | r 12 | 12 ˆ r is a unit vector pointing...

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Force Laws Unit of force is Newtons, N, (kg m s -2 ), in SI units Newton’s Law of Gravity: 1 2 2 12 12 ˆ grav G m m r F = r m is mass, measured in kg (SI units). Think of it as the “charge” for gravity. G = 6.67 10 - 11 N m 2 kg -2 is Newton’s gravitational constant 2 12 r 1 PHY2049 Physics 2 Lecture Notes Coulomb D. Acosta Page 2 8/25/11 12 r is the distance between two masses, i.e.
Image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: | r 12 | 12 ˆ r is a unit vector pointing along the direction between mass 1 and mass 2 Note that mass is always defined positive (only one type of gravitational “charge”). Also, the force is always attractive, not repulsive. So the direction of the force is always toward another mass....
View Full Document

{[ snackBarMessage ]}