Microsoft PowerPoint - Knight Ch 13 - gravity - notes

Microsoft PowerPoint - Knight Ch 13 - gravity - notes - 1...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 1 The same Sir Isaac Newton who gave us his Three Laws of Motion also developed the Law of Universal Gravitation, G = 6.673 x 10-11 Nm 2 /kg 2 r F F m 1 m 2 G is called the universal gravitational constant Newtons Theory of Gravitation-Chapter 13 Gravity A La Newton r F F m 1 m 2 Newtons Law of Universal Gravitation is referred to as an inverse __________ law. Perhaps a more complete way to describe this law is Where the minus sign indicates that this is an __________ force! 12 2 2 1 12 r r m m G F r r = 1.Gravitational force is a ___________! 2.Force exists between any two __________ particles. 3.Force is proportional to the product of the masses and inversely proportional to the distance squared between the two particles. 4.Gravity is ___________________ attractive! 5.The gravitational force exerted by a spherical object on a particle outside the sphere is the same as if the entire mass of the sphere were concentrated at its center. This is Newtons Shell Theorem. GravitationalForces r r M M m m = 2 2 2 11 2 2 1 (10m) g) (60kg)(60k /kg Nm 6.67x10 r m m G F = = What has a greater influence (gravitationally) on my evil twin: myself (Dr. Pope) at a distance of 10m or Jupiter? Dr. Pope Dr. Popes mass 60 kg Evil twins mass 60 kg F Dr. Pope = 2.4x10-9 N ASTROLOGY ______ 2 What has a greater influence (gravitationally) on my evil twin : Dr. Pope at a distance of 10m or Jupiter? F Dr. Pope =2.4x10-9 N Jupiter Jupiters mass: 1.9x10 27 kg Distance from earth: 6.28x10 11 m 2 11 27 2 2 11 2 2 1 m) (6.28x10 kg) x10 (60kg)(1.9 /kg Nm 6.67x10 r m m G F = = F Jupiter =1.9x10-5 N F Jupiter ____ F Dr. Pope Note: at a distance of _______ I would have a larger influence!!! ASTROLOGY Gravitational Effects of several objects 1 kg 2 kg 1 kg 1 kg 1 kg Four masses sit at the corners of a square with sides of 1m. What is the magnitude and direction of the net force on the 1 kg mass atthe center of the square? Gravitational Effects of several objects...
View Full Document

Page1 / 6

Microsoft PowerPoint - Knight Ch 13 - gravity - notes - 1...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online