p111_lecture8

p111_lecture8 - Chapter 4 Forces and Newtons Laws of Motion...

Info iconThis preview shows pages 1–7. 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

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

View Full DocumentRight 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: Chapter 4 Forces and Newtons Laws of Motion 4.6 Types of Forces: An Overview Examples of Nonfundamental Forces-- All of these are derived from the electroweak force: normal or support forces friction tension in a rope 4.8 The Normal Force Definition of the Normal Force The normal force is one component of the force that a surface exerts on an object with which it is in contact namely, the component that is perpendicular to the surface. For a block of weight W sitting at rest on a table, from Newtons 2 nd law: F y = F N- W = ma y = 0 --> F N = W , and is directed upward Weight is the downward force exerted by gravity on an object. 4.8 The Normal Force N 26 N 15 N 11 = = ! ! N N F F N 4 N 15 N 11 = = ! + N N F F F = F N + F H + W = 0 4.8 The Normal Force The weight , W , of an object can be associated with its mass , m , using Newtons 2 nd law: +y m W a y = -g F y = -W = ma y = m (-g )--> W = mg 4.8 The Normal Force Apparent Weight The apparent weight of an object is the reading of the scale....
View Full Document

Page1 / 18

p111_lecture8 - Chapter 4 Forces and Newtons Laws of Motion...

This preview shows document pages 1 - 7. Sign up to view the full document.

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