Chapter 1.1 Notes Vectors, Force, Inertia, Torque, Mass & Weight.

Slides:

Advertisements

Similar presentations

Force/Newton’s First Law Notes

Advertisements

Force in Mechanical Systems

Chapter 3 NEWTON’S 1 ST LAW INERTIA. HISTORY OF INERTIA Aristotle: force is necessary to maintain motion Galileo: objects maintain state of motion unless.

Force in Mechanical Systems

Forces & Motion. Motion A change in the position of an object Caused by force (a push or pull)

Chapter 10, Section 1 The Nature of Force Monday, March 8, 2010 Pages

Newton’s Laws and Forces. Forces Force = a push or pull – changes speed of an object – changes direction of an object – can be touching or long distance.

FORCES Mrs. Cholak.

Motion and Force Chapter Twelve: Distance, Time, and Speed Chapter Thirteen: Forces Chapter Fourteen: Force and Motion.

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.

Chapter 2 Mechanical Equilibrium

FORCES. Force is a vector quantity and is measured in newtons (1N) There are different type of forces: – weight – friction force – normal reaction force.

Mechanical Force Notes

What is net force?.

Forces in Mechanical Systems

1. What is a Force?  A force is a push or pull on an object by another object and measured in newton (N).  Forces are vectors 2 Force is a push Force.

Force A push or pull exerted on an object..

Force in Mechanical Systems

Chapter 1 – Prime Movers Mechanical Systems – Force Fluid Systems – Pressure Electrical Systems – Potential Difference (Voltage) Thermal Systems – Temperature.

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.

They describe the motion of objects in terms of  their MASS and  the FORCES acting on them Mass – the amount of matter that an object contains a measure.

Chapter 4 Newton’s Laws of Motion. Newton’s First Law of Motion Every object continues in its state of rest, or of uniform motion in a straight line,

Chapters 5-6 Test Review Forces & Motion Forces  “a push or a pull”  A force can start an object in motion or change the motion of an object.  A force.

Today’s Topic Unit 1: Forces Forces BOTH Quantities that have BOTH size and direction are called Vectors. ONLY Quantities that have ONLY size are called.

1 Describing Motion Newton’s Laws. 2 First we need to define the word FORCE: The cause of motion (what causes objects to move) Two types of forces –Pushes.

Chapter 2 Notes Mechanical Equilibrium. ·Things in mechanical equilibrium are stable, without changes in motion. ·Ex: Rope.

Force and Motion Laughlin’s Science Class. Motion Motion refers to the change in position of an object over a period of time.

Force in Mechanical Systems

2.1 Forces. An object in mechanical equilibrium is stable, without changes in motion.

1.4 Forces change motion.

Forces & Motion. Motion A change in the position of an object Caused by force (a push or pull)

Unit 4 Lesson 2 Balanced and Unbalanced Forces

Chapter 3 Newton’s 1st Law of Motion Inertia. Net Forces cause changes in motion.

Inertia: “The property of objects to resist changes in motion.”

Earth’s Force Questions And Answers Popham 6 Science Dr. Browne.

Physics Section 4.2 Apply Newton’s 1st Law of Motion Newton’s 1 st Law of Motion (Law of Inertia) An object at rest remains at rest and an object in motion.

Chapter 3 Forces & Motion. Newton’s 1 st Law of Motion An object at rest will remain at rest unless acted upon by an unbalanced force. An object in motion.

Describing Motion Newton’s Laws.

Forces change Motion.

Newton’s 1st Law Ch. 4 Sec. 2.

A force is a push or a pull.

Force, Mass, & Acceleration

Section 2.1 Forces change motion

Newton’s First Law of Motion

3.1 Force, Mass and Acceleration

Motion and Forces.

Newton’s Laws of Motion

Sir Isaac Newton

Applied Physics: Chapter 2 Review

Connecting Motion with Forces

Chapter 6 Newton’s First Law.

Force and Motion Vocabulary

Unit 4 Lesson 2 Balanced and Unbalanced Forces

Newton’s First Law of Motion

Newton’s 1st Law of Motion

Force A push or pull exerted on an object..

Describing Motion Newton’s Laws.

Force and Motion Vocabulary

Newton’s 1st Law – Inertia

Chapter 2-2 Newton’s First Law.

Chapter 2 Mechanical Equilibrium

Chapter 2 Forces.

Presentation transcript:

Chapter 1.1 Notes Vectors, Force, Inertia, Torque, Mass & Weight

Force You can measure force with a Spring scale.

Force depends on 2 things; Size or strength of the force and the Direction of the force. Force depends on 2 things; Size or strength of the force and the Direction of the force.Direction

Vectors Vs. Scalar A quantity with size and direction is called a Vector. Vector Some quantities are described by size only; they are called Scalars. Scalars

A vector is drawn as an arrow. arrow The size of the arrow is proportional to the size of the vector. The arrow points in the direction of the vector.

If forces are equal but opposite, they are balanced. If one force is greater than the opposite force, than it is an unbalanced force.

The sum of forces is called the net force. If the net force is not zero, the applied forces are unbalanced. If the net forces are zero, the applied forces are balanced and cancel each other out. The object is in equilibrium.

If two or more forces act in the same direction, add to get the net force. If two forces act in opposite directions, subtract to get the net force.

Never mix units. For example does 30 pounds added to 20 newtons equal 50? NO

3 guys are pulling a rope to the north, each pulling at 200 N. 3 girls are pulling the same rope to the south, each pulling at 150 N. What is the vector sum?

150 S S S = 450 South 200 N N N = 600 North 600 North – 450 South = 150 North Net Force = 150 North

If the forces do not act along a straight line you can use the Graphical method to find the resultant sum. Graphical

Also, you can use the Pythagorean theorem to find the resultant sum. Pythagorean The Pythagorean theorem is A 2 + B 2 = C 2

If A = 40 N and B equals 30 N, what is the resultant sum (C)?

1. A 2 + B 2 = C A=40; B= = C = C = C = C First plug in what you know Square A and B Add A and B Square root the answer

Newton’s 1 st law of motion: objects will remain at rest or continue to move unless acted on by a force. 1 st1 st Newton’s first law is also called the law of Inertia. Inertia is the property of an object to resist change in motion.

Inertia Demos 1.Table Cloth Magic 2.Mardi Gras Beads 3.Wheel Gyroscope a. Rope b. Stool

Mass Vs. Weight MassMass is a measure of the total amount of matter contained within an object. Mass WeightWeight is a measure of the force of the Earth’s gravity on the mass of the object. Weight

Torque Torque is a quantity that caused rotation in mechanical systems. Torque = the product of Force (F) times the Length of the lever arm. (T = F x L) Units of Torque = Newtons meters (N x m)

A torque wrench has a lever arm of.5 m. A force of 100 N is applied at the end of the wrench to tighten a bolt. Find the torque applied to the bolt Length=.5 m, Force = 100 N 2. 2.Torque = Length x Force 3. 3.Torque =.5 m x 100 N 4. 4.Torque = 50 Nm

Opposing torques are common in systems. If opposing torques cancel each other out, the system is a balanced system. A system that is a balanced system that is not moving, will remain at rest. If the system is moving already, the system will continue to rotate at the same speed.