Newton’s Laws of Motion.  A force is a push or a pull  A force is a vector  Force has both magnitude and direction  Unit for force is Newtons (N)

Slides:

Advertisements

Similar presentations

Aim: What are Newtons 1 st and 3 rd Laws of Motion? Do Now: What is the weight of the box? m = 20 kg F g = mg F g = (20 kg)(9.8 m/s 2 ) F g = 196 N.

Advertisements

Newton’s 2nd Law of Motion

Forces and Newton’s 3 Laws

Forces & Motion answers

The Law of Inertia. Objects at rest remain at rest unless acted upon by an outside force. Objects in motion will remain in motion unless acted upon by.

Force and motion Forces acting together

P3c(i) Forces and Motion You will find out about How a force speeds up or slows down an object How Force, Mass and Acceleration are linked How to use the.

Newton's First Law of Motion

FORCE. Force: a vector with the units - Newton (N). "An object at rest tends to stay at rest and an object in motion tends to stay in motion; A force.

FORCE A force is any influence that can change the velocity of a body. Forces can act either through the physical contact of two objects (contact forces:

D O N OW Write your HW in your agenda Update your table of contents: Have pages 152 and 153 ready to be checked Fold the notes and attach to page 155.

Do Now: What are Newton’s 3 Laws of Motion?. Do Now: What are Newton’s 3 Laws of Motion?

Forces and the Laws of Motion

Newton’s First Law of Motion

Newton’s First Law of Motion. First we need to define the word FORCE: The cause of motion (what causes objects to move) Two types of forces –Pushes –Pulls.

Motion and Force Force = anything that changes the state of rest or motion of an object Balanced ForceUnbalanced Force When the forces applied to an object.

Sir Isaac Newton Newton’s Laws of Motion Newton’s 1st Law of Motion -An object at rest, will remain at rest, unless acted upon by an unbalanced.

VIDEO OF MOTION What cause motion….? A force also can cause: a. a moving object to change its speed c. a moving object to change its direction of motion.

Newton’s 1 st Law Inertia. Force Anything capable of changing an object’s state of motion Any push or pull Causes object to speed up, slow down, or change.

Section 3: Motion and Forces

Newton’s 1 st Law of Motion, Weight & Applying Newton’s 2 nd Law Chapter 6.2 System.

If you could kick the person in the pants responsible for most of your trouble, you wouldn't sit for a month. Theodore Roosevelt.

Force. Something that changes the state of rest or the state of motion of an object. Can be a push or a pull Unit of measure Newtons N.

Physical Science Laws of Motion. Objectives Identify the law that says that objects change their motion only when a net force is applied Relate the first.

Why does everything in the universe move?

11.1 Newton’s First Law. INERTIA An object at rest remains at rest, and an object in motion maintains its velocity unless it experiences an unbalanced.

The tendency of objects to resist change in their state of motion is called inertia  Inertia is measured quantitatively by the object's mass.  Objects.

Forces and the Laws of Motion

Newton’s First Law. INERTIA An object at rest remains at rest, and an object in motion continues with constant velocity unless it experiences a net external.

Newton’s Second Law: Force and Acceleration

MS. MORGAN Force. What is a Force? Something that changes the state of rest or the state of motion of an object. Can be a…. push or a pull Unit of measurement:

  Developed the concepts of both gravity and motion  Laid the foundation for modern science  Developed the 3 Laws of Motion.

Key Concepts What is Newton’s first law of motion? What is Newton’s second law of motion? Key Terms - Inertia.

1.4 Forces change motion.

FORCE. Any push or pull Has two components: magnitude and direction Force is a quantity capable of changing the size, shape, or motion of an object SI.

Forces and Newton’s 3 Laws. What is a force? Push or pull Produce changes in motion or direction.

L7-s1,9 Physics 114 – Lecture 7 Chapter 4 Dynamics: Newton’s Laws of Motion We now investigate why bodies undergo motion. Why do bodies accelerate? They.

Newton’s Laws First Law of Motion –An object at rest will stay at rest or an object in motion will continue to move in a straight line with constant speed.

IF YOU ARE SITTING STILL IN YOUR SEAT ON A BUS THAT IS TRAVELING ON A HIGHWAY, IS YOUR BODY AT REST OR IN MOTION?

Newton’s Laws of Motion.  Only the resultant force affects motion, not the component forces.  If forces are balanced (no resultant force)  Object at.

P.1 Book 2 Section 3.2 Inertia and Newton's first law 3.2Inertia and Newton’s first law Traffic accident Is a force needed to keep a body moving? Inertia.

Newton’s First Law of Motion. First we need to define the word FORCE: The cause of motion (what causes objects to move) Two types of forces –Pushes –Pulls.

Newton’s First Law of Motion

Newton’s Laws.

Newton’s First Law What makes an object speed up, slow down, or change directions? Objects change their state of motion only when a net force is applied.

FORCE A force is any influence that can change the velocity of a body. Forces can act either through the physical contact of two objects (contact forces:

CH4: Forces and Newton's Laws of Motion

Forces Third Law First Law and Equilibrium Second Law and Acceleration.

Force Diagrams.

Newton’s First and Second Laws

Notes 2.2: Newton’s 2nd Law of Motion

Chapter 4 Forces.

FORCE and MOTION REVIEW

Newton’s Laws of Motion

Sir Isaac Newton

Object at rest stays at rest,

Newton’s Three Laws of Motion

FORCE AND MOTION.

Chapter 13 Section 3 Newton’s Laws of Motion

Chapter 4 Section 2 Newton’s First Law Objectives

Chapter 6 Newton’s First Law.

Objective SWBAT describe Newton’s second law of motion and use it to explain the movement of objects.

Forces in One Dimension

FORCE Newton’s Laws: Kinematics vs. Dynamics Friction:

Newton’s Second Law If all forces are in balance, object is at equilibrium and does accelerate Newton’s second law applies when forces are unbalanced;

Chapter 13 Section 3 Newton’s Laws of Motion

Motion & Forces: Newton’s Laws of Motion

Force - a push or pull on an object

Presentation transcript:

Newton’s Laws of Motion

 A force is a push or a pull  A force is a vector  Force has both magnitude and direction  Unit for force is Newtons (N)

 When a more than one force acts on a body at the same time, each individual force is called a component force  The total sum of all the component forces acting on an object is the resultant force  For any one object, there can be several component forces, but only be one resultant force.  Sometimes, resultant force is also called “net force”

 When there is no resultant force (or resultant force = 0), the object is said to be balanced  When there is a resultant force, the object is said to be unbalanced.  We will discuss more about balanced and unbalanced forces in this chapter, and later in chapter 5.

 Textbook on Penny Board (stationary)  Learning Point: An object at rest will want to remain at rest – this effect is sometimes referred to as “inertia”  Another illustration: when you are standing still in a stationary bus, and the bus suddenly accelerates forward

 Textbook on Penny Board (moving)  Learning Point: an moving in a straight line will want to continue moving in a straight line.  Another illustration: when a vehicle suddenly brakes  Application: Safety features of a Car (seatbelt and headrest)

 When there is no resultant force (i.e. balanced forces)  An object at rest remains at rest  An object in uniform motion remains in uniform motion  uniform motion = travelling in a straight line AND constant speed

 BMW Motorbike Table Cloth Trick  Mythbusters Attempt (Part 1) eA eA  Mythbusters Attempt (Part 2) Yg Yg  How it’s really done? Uk Uk

 Pull a light person sitting on a pennyboard (constant force)  What do you observe while the person is being pushed? Is the speed constant?  Push a heavier person with the same force.  Push the same person, but with a larger force.  What do you observe?

 When there is a resultant force F resultant,  The object experiences an acceleration in the same direction of F resultant  This acceleration is the ratio of F resultant to the mass of the object  Equation form: F resultant = ma

 Textbook Pg 54, Work Example 3.2  A boy pushes a stationary box of mass 20 kg with a force of 50 N. Calculate the acceleration of the box (assume no friction)  F= ma  a = F/m  = (50)/(20)  = 2.50 ms -2 in the direction of the applied force

 Newton’s First Law:  Object at rest remains at rest  Object in uniform motion remains in uniform motion  Newton’s Second Law:  F = ma