Presentation is loading. Please wait.

Presentation is loading. Please wait.

Newton’s Third Law. Forces Contact Forces – Normal, Tension, Friction, Applied, etc. Action-at-a-Distance Forces – Gravity, Electromagnetism Any two objects.

Published byLauren Stephens Modified over 9 years ago

Similar presentations

Presentation on theme: "Newton’s Third Law. Forces Contact Forces – Normal, Tension, Friction, Applied, etc. Action-at-a-Distance Forces – Gravity, Electromagnetism Any two objects."— Presentation transcript:

1 Newton’s Third Law

2 Forces Contact Forces – Normal, Tension, Friction, Applied, etc. Action-at-a-Distance Forces – Gravity, Electromagnetism Any two objects that are interacting will apply forces on each other. Two objects are involved.

3 Newton’s Third Law Newton called forces “actions” For every action, there is an equal and opposite reaction

4 Action-Reaction Pairs All forces come in pairs Every force has an equal and opposite force F g =mg (the gravitational force pulling the book toward the earth) F N =mg (the normal force of the surface pushing up on the book)

5 F fw F wf

6 F wa F aw

7 F rw F wr

8 F rf F fr

9 Newton’s Laws Summary 1.Objects in motion tend to stay in motion and objects at rest tend to stay at rest. 2.Objects accelerate when acted upon by an external unbalanced force (a net force). The objects will accelerate proportionally to the force, and inversely proportional to their mass according to this equation: F=ma 3.Every action has an equal and opposite reaction.

10 Skills you need: 1.Draw Free Body Diagrams 2.Determine Net Force 3.Manipulate and use F=ma 4.Combine F=ma with kinematic equations 5.Understand the basics of tension and pulleys 6.Perform unit analysis 7.Understand how and when to use g=9.8N/kg or 9.8m/s 2

11 Basic Pulley Question I Find the acceleration of the following system: 500g 350g Frictionless Surface

12 Basic Pulley Question II Find the string tension in the following system: 500g 350g Frictionless Surface

13 Intermediate Pulley Question Find the acceleration and tension of the following system if there is 2N of friction on the 500g block due to the surface. 500g 350g

14 Advanced Pulley Question Find the acceleration of the following system if there is 1N of friction on the 500g block due to the surface. 500g 350g550g Frictionless Surface

15 Advanced Pulley Question II Find the mass of block M if the system accelerates at 1m/s 2 to the right. 500g M550g Frictionless Surface

16 Pulleys Redirect Forces

17 Hanging Pulley 2:1 Advantage

18 Multiple Pulleys 4:1 Advantage

Download ppt "Newton’s Third Law. Forces Contact Forces – Normal, Tension, Friction, Applied, etc. Action-at-a-Distance Forces – Gravity, Electromagnetism Any two objects."

Similar presentations

Forces and Newton’s 3 Laws of Motion Robert Strawn Compiled 10/16/11.

Forces and Newton’s 3 Laws of Motion Robert Strawn Compiled 10/16/11.
Chapter 4 The Laws of Motion.

Chapter 4 The Laws of Motion.
Physics Exploring Newton’s Laws of Motion. Newton’s First Law of Motion  Inertia  A body in motion tends to stay in motion unless acted upon by an outside.

Physics Exploring Newton’s Laws of Motion. Newton’s First Law of Motion  Inertia  A body in motion tends to stay in motion unless acted upon by an outside.
Exam 1: Chapters 1-4 75% Problems – one problem from WebAssign with different numbers Understand homework problems Review notes and text Try new problems.

Exam 1: Chapters % Problems – one problem from WebAssign with different numbers Understand homework problems Review notes and text Try new problems.
Lecture 4 Monday: 26 January 2004 Newton’s Laws of Motion.

Lecture 4 Monday: 26 January 2004 Newton’s Laws of Motion.
Newton’s Laws.

Newton’s Laws.
Chapter 13: Kinetics of a Particle: Force and Acceleration.

Chapter 13: Kinetics of a Particle: Force and Acceleration.
Chapter 4 The Laws of Motion. Forces Usually think of a force as a push or pull Usually think of a force as a push or pull Vector quantity Vector quantity.

Chapter 4 The Laws of Motion. Forces Usually think of a force as a push or pull Usually think of a force as a push or pull Vector quantity Vector quantity.
Chapter 5 Newton’s Laws of Motion. 5-1 Force and Mass Force: push or pull Force is a vector – it has magnitude and direction.

Chapter 5 Newton’s Laws of Motion. 5-1 Force and Mass Force: push or pull Force is a vector – it has magnitude and direction.
Chapter 5 The Laws of Motion. Forces Usually think of a force as a push or pull Usually think of a force as a push or pull Vector quantity Vector quantity.

Chapter 5 The Laws of Motion. Forces Usually think of a force as a push or pull Usually think of a force as a push or pull Vector quantity Vector quantity.
Weight is a force that is defined from the gravitational attraction between two masses. The gravitational force causes the less massive object to accelerate.

Weight is a force that is defined from the gravitational attraction between two masses. The gravitational force causes the less massive object to accelerate.
NEWTON'S LAWS OF MOTION There are three of them.

NEWTON'S LAWS OF MOTION There are three of them.
Newton’s Second and Third Laws

Newton’s Second and Third Laws
Copyright © 2012 Pearson Education Inc. PowerPoint ® Lectures for University Physics, Thirteenth Edition – Hugh D. Young and Roger A. Freedman Chapter.

Copyright © 2012 Pearson Education Inc. PowerPoint ® Lectures for University Physics, Thirteenth Edition – Hugh D. Young and Roger A. Freedman Chapter.
Chapter 4 The Laws of Motion. Classical Mechanics Describes the relationship between the motion of objects in our everyday world and the forces acting.

Chapter 4 The Laws of Motion. Classical Mechanics Describes the relationship between the motion of objects in our everyday world and the forces acting.
Forces and the Laws of Motion Force, Mass, and Acceleration

Forces and the Laws of Motion Force, Mass, and Acceleration
Newton’s 2 nd Law. Force on Object Objects acted on by a net unbalanced force will accelerate in the direction of the force This means they will speed.

Newton’s 2 nd Law. Force on Object Objects acted on by a net unbalanced force will accelerate in the direction of the force This means they will speed.
Forces Contact Forces - those resulting from physical contact between objects –Normal Force –Friction –Tension (spring/rope) –Compression Action at a Distance.

Forces Contact Forces - those resulting from physical contact between objects –Normal Force –Friction –Tension (spring/rope) –Compression Action at a Distance.
Force A push or pull exerted on an object..

Force A push or pull exerted on an object..
Newton’s Second Law In this chapter we investigate the effect of a net force on a mass. Newton’s Second Law is: Whenever an unbalanced force acts on a.

Newton’s Second Law In this chapter we investigate the effect of a net force on a mass. Newton’s Second Law is: Whenever an unbalanced force acts on a.

Similar presentations

Ads by Google