Study guide for Exam2

Study guide for Exam2 - Read the summary pages after each...

Info iconThis preview shows pages 1–2. 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: Read the summary pages after each chapter. This is my summary of the summary pages at the end of each chapter. Chapter 4 Force and Newtons Laws of Motion o A force is a push or a pull. It is a vector quantity and has units of Newton: 1 N 1 kg m/s 2 . o The net force on a system is the vector sum of all the forces acting on it. o Newtons 1 st Law: If zero net force acts on an object, the objects velocity does NOT change. If there is a net force, there is acceleration, so the velocity (speed or direction) must change. o Newtons 2 nd Law: The net force acting on an object is related to the objects acceleration through its mass: F a m = r r or F ma = r r o Many problems can be solved by treating the x- and y- components separately. o Drawing a free body diagram involves drawing vector arrows representing every force acting on a chosen object. o The magnitude of the gravitational force between two objects is 1 2 2 Gm m F r = where r is the distance between the objects centers. Each object is always pulled toward the others center o Weight is defined to be the magnitude of the gravitational force acting on an object: W mg = . Weight is proportional to mass. o A normal force (usually denoted by N ) is a contact force perpendicular to a surface that pushes each object away from the other....
View Full Document

This note was uploaded on 12/23/2011 for the course PHY 2130 taught by Professor Rehse during the Fall '08 term at Wayne State University.

Page1 / 4

Study guide for Exam2 - Read the summary pages after each...

This preview shows document pages 1 - 2. Sign up to view the full document.

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