net force & free body diagrams net force = vector sum of the forces acting on an object free...

6

MORE ABOUT FORCES

Upload: merry-jefferson

Post on 29-Dec-2015

213 views

Category:

Documents

0 download

Report

Download

Embed Size (px):

TRANSCRIPT

Page 1: Net force & Free Body Diagrams Net force = vector sum of the forces acting on an object Free Body Diagram (FBD) depicts the forces acting on an object

MORE ABOUT FORCES

Page 2: Net force & Free Body Diagrams Net force = vector sum of the forces acting on an object Free Body Diagram (FBD) depicts the forces acting on an object

Net force & Free Body Diagrams

• Net force = vector sum of the forces acting on an object

• Free Body Diagram (FBD) depicts the forces acting on an object• Arrows point in direction of forces• Relative lengths of arrows show relative magnitudes of forces

Page 3: Net force & Free Body Diagrams Net force = vector sum of the forces acting on an object Free Body Diagram (FBD) depicts the forces acting on an object

NET FORCE• Net = total• Net force is the vector sum of all the forces acting

on an object.• Direction of the force matters! (Pay careful attention to

+ and – signs)

Page 4: Net force & Free Body Diagrams Net force = vector sum of the forces acting on an object Free Body Diagram (FBD) depicts the forces acting on an object

An example

• Consider the rabbit• 2 forces act on it:• Its weight pulls it downward• The magician’s hand holds it up

W

Fhand

Fnet=Fhand+W

Page 5: Net force & Free Body Diagrams Net force = vector sum of the forces acting on an object Free Body Diagram (FBD) depicts the forces acting on an object

An example continued

• Suppose the rabbit has a mass of 2 kg• What is its weight?• What sign can be used to indicate the

direction that the weight acts?

• Suppose the magician pull the rabbit out of the hat with a force of 30N• What is the net force on the rabbit?

W=mg

W= -19.6N

Fhand=+30N

Fnet=Fhand+W

Fnet= +30-19.6

Fnet = +10.4 N

Page 6: Net force & Free Body Diagrams Net force = vector sum of the forces acting on an object Free Body Diagram (FBD) depicts the forces acting on an object

Equilibrium

• If the forces are balanced, the net force is on an object is zero. We say that an object is in equilibrium.• How would you expect an object that’s in equilibrium to ‘react’ to the forces

acting on it?

• How would you expect an object that’s not in equilibrium to ‘react’ to the forces acting on it?

What is net force?. All the forces acting on an object

Forces acting on restorations

gcseprep.com · Web view5.5 Newton's Laws - Low demand – Questions . Q1. (a) The diagram shows two forces acting on an object. What is the resultant force acting on the object?

Forces Acting on Dislocations

Free Body Diagrams For any complicated situation, 1)Isolate each object; 2)Draw all forces acting on it; 3)Use for each object

Forces acting on a lamina - MEImei.org.uk/files/Flash/Forces acting on a lamina - Instructions... · Forces acting on a lamina ... a polygon of forces that starts at the centroid

Lecture Presentation - Calhoun Physics · What Do Forces Do? •Net Force •The unbalanced force •The summation of all forces acting on an object •Must work in axis separately

7K Forces and their effectsassets.pearsonglobalschools.com/asset_mgr/current/...4.2 Forces Recognise the forces acting on an object in different situations.. 7Ka, 7Kc, 7Kd 7Ke Distinguish

Forces Acting on Gravity Dam

Forces LO:. Force and acceleration If the forces acting on an object are unbalanced then the object will accelerate, like these wrestlers: Force (in N)

Physics SPM 2017 Chapter 2: Forces and Motion · PDF filePhysics SPM 2017 Chapter 2: Forces and Motion ... Note: If two equal forces are acting upon an object at an angle, the simplified

STUDENT WORKSHEET OF NATURAL SCIENCE · straight, unless there are forces acting to change. This law states that if the resultant force (vector sum of all forces acting on the object)

binder9 - MIT OpenCourseWare€¦ · (a) An object with a mass m is on the floor of an elevator that is accelerating upward. (b) Forces acting on the object. (c) Forces acting on

Force Diagrams and Calculations More Math!!!. Force Diagram 1 Are the forces acting on this object balanced or unbalanced? What is the net force acting

FORCES AND MOTION · unbalanced force: forces that do not cancel each other out when acting together on a single object Forces and Motion Page 8 Glossary ©Cheryl!Gore!2013! Title:

I. FORCES ACTING ON A BODY A. IDENTIFYING FORCES DEFINE ...mrsmithsphysics.weebly.com/.../2.2_forces_and_dynamics_class_notes.pdf · 2.2 forces and dynamics notes i. forces acting

Forces acting on yarn and traveller

Forces Force – any push or pull acting on an object Net force – the total of all forces acting on an object Balanced forces – when the net force = 0 N,

· PDF fileThe Open Academy Page 1 Forces Easier (a) The diagram shows two forces acting on an object. What is the resultant force acting on the object?

Fig. 04 - University of FloridaIdentify all the external forces acting on the object. Draw an FBD to show all the forces acting on the object. Choose a coordinate system. If the direction

Types of forces. Forces acting on an object All forces are measured Newtons. Not all forces are present in every situation. Identify the forces that apply

The surrounding fluid exerts pressure forces and viscous forces on an object. The components of the resultant force acting on the object immersed in the

Ch. 2 The Laws of Motion · 2016. 9. 21. · Balanced Forces - forces acting on an object ... Unbalanced Forces - forces acting on an object that combine and form a net force that

Forces KS2 Physics - northampton.ac.uk · Forces Unsupported objects fall towards the Earth because of the force of gravity acting between the Earth and the falling object. Forces

Force and Motion Notes - FLIPPED OUT SCIENCE! …...Balanced Forces and Motion Are equal forces acting on one object in opposite directions. Equal forces acting on an object will not

VISUAL PHYSICS ONLINE DYNAMICS TYPES OF FORCES FRICTION · 2017-12-17 · 1 VISUAL PHYSICS ONLINE DYNAMICS TYPES OF FORCES FRICTION Friction force: the force acting on the object

Lesson 2 Graphing Motion - Doral Academy Preparatory School · object, the forces combine and act as one force. • The sum of all the forces acting on an object is called the net

Forces Acting on the Aircraft

EXOS Certification Acceleration - FINAL (3) · 2014-08-30 · kinetics The study of forces acting on or produced by an object kinematics ... Newton’s 1st Law (Inertia): An object

Force and Motion Test Review Questions. Vocabulary two or more unequal forces acting on an object, causing the object to accelerate

1.2.3 Equilibrium. Objective Draw and use a triangle of forces to represent the equilibrium of three forces acting at a point on an object

Forces acting in the knee joint

Resultant Forces - todhigh.comtodhigh.com/.../uploads/2018/03/Resultant-Forces.pdfVector diagrams of balanced forces When an object is in equilibrium, the forces acting on the object

Forces. - The Nature of Force Combining Forces The combination of all forces acting on an object is called the net force

Chapter 5.3 Learning Goals Determine the net force acting on an object. Define equilibrium. Draw free-body diagrams to represent all forces acting