Microsoft PowerPoint - Knight Ch 13 - gravity - notes

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

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

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

View Full Document
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 Newton’s Theory of Gravitation-Chapter 13 Gravity A La Newton r F F m 1 m 2 Newton’s 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 Newton’s 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. Pope’s mass 60 kg Evil twin’s 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 Jupiter’s 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

{[ snackBarMessage ]}

### 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
Ask a homework question - tutors are online