Warmup Be prepared to answer the following: 1)What is required to turn an object travelling in a straight line? 2)What is required to rotate a stationary.

Slides:

Advertisements

Similar presentations

Section 13.3 & 13.4 Centripetal and Centrifugal Forces

Advertisements

Round and round… Circular Motion. Circular Speed & Velocity When objects move in a circular path, we will only consider those that have a constant speed.

 The point or line that is the center of the circle is the axis of rotation.  If the axis of rotation is inside the object, the object is rotating (spinning).

Chapter 10 CIRCULAR MOTION

Accounting for Angular Momentum Chapter 21. Objectives Understand the basic fundamentals behind angular momentum Be able to define measures of rotary.

Chapter 10. Uniform Circular Motion

Circular Motion What is Circular Motion? Uniform Circular Motion is motion along a circular path in which there is no change in speed, only a change.

Chapter 10 Rotational Motion

Circular Motion Terms  The point or line that is the center of the circle is the axis of rotation.  If the axis of rotation is inside the object, the.

10 Circular Motion Centripetal force keeps an object in circular motion.

Objectives: The student will be able to:

Chapter 8 Rotational Motion Forces and circular motion Circular motion = accelerated motion (direction changing) Centripetal acceleration present Centripetal.

Rotational Motion. Rotational motion is the motion of a body about an internal axis. In rotational motion the axis of motion is part of the moving object.

7.3 Circular Motion and Gravity pp Mr. Richter.

Uniform Circular Motion. How does a roller coaster do a loop without falling off the track? How is water removed from a clothes washer?

Rotation of rigid objects- object with definite shape

© 2010 Pearson Education, Inc. Chapter 8: ROTATION.

Chp 9-11 Rotational Motion. Some Vocab Terms  Axis – the straight line around which rotation takes place  Rotation – when an object spins around an.

Circular Motion; Gravitation

© 2010 Pearson Education, Inc. Conceptual Physics 11 th Edition Chapter 8: ROTATION Circular Motion Rotational Inertia Torque Center of Mass and Center.

Tangential and Centripetal Accelerations

CIRCULAR MOTION.

Circular Motion. Uniform Circular Motion Motion of an object at constant speed along a circular path.

Circular Motion; Gravitation

Rotational Motion Chapter 6, 8 and 9. Acceleration in a Circle  Acceleration occurs when velocity changes  This means either speed OR direction changes.

CIRCULAR MOTION Mr. Theuerkauf.

Circular Motion. Uniform Circular Motion Speed of object may be constant Velocity is constantly changing Direction of the velocity is tangent to the circle.

 Rotation – object spinning around an internal axis. Ex: a spinning top  Revolution – object spinning around an external axis. Ex: Earth moving around.

Rotational Motion. Tangential and Rotational Velocity.

Chapter 8 Rotational Motion.

10 Circular Motion Centripetal force keeps an object in circular motion.

Circular Motion. PhET Lady Bug Motion Think about this Click “Show Both” at the top, and “Circular” at the bottom Watch the following and comment: Which.

Conceptual Physics Notes on Chapter 9 CircularMotion.

Circular Motion (Chapter 9).

Uniform Circular Motion Centripetal forces keep these children moving in a circular path.

Chapter 8 Rotational Motion.

Circular Motion. Rotation and Revolution When a body turns about it’s axis is known as a rotation. When a body turns about it’s axis is known as a rotation.

 Rotation – when an object turns about an internal axis.  Think of this as spinning  Revolution – when an object turns about an external axis.  Think.

Chapter 6.2. Uniform Circular Motion Centripetal forces keep these children moving in a circular path.

EQ: Why does an object in circular motion have a constant velocity yet an acceleration and unbalanced force that is directed toward the center of the circle?

Rotational Motion of an Object Physics Matters: Chapter 7.

Circular Motion and Other Applications of Newton’s Laws

Circular Motion, Center of Gravity, & Rotational Mechanics

Chapter 9 Circular Motion. Axis: The straight line about which rotation takes place Rotation: Spin, when an object turns about an internal axis Revolution:

Circular Mtotion In physics, circular motion is rotation along a circle: a circular path or a circular orbit. It can be uniform, that is, with constant.

Goal: To understand angular motions Objectives: 1)To learn about Circular Motions 2)To learn about Rotational Inertia 3)To learn about Torque 4)To examine.

Conceptual Physics Chapter 10

Physics Chapter 8 – Rotational Motion Part 2. Review of Circular Motion Tangential Speed vs Rotational Speed Tangential Speed vs Rotational Speed Rotational.

C ENTRIPETAL A CCELERATION. This unit we will investigate the special case of kinematics and dynamics of objects in uniform circular motion – traveling.

Circular Motion Things that Travel in a CIRCLE!!.

 Linear Speed increases when the distance from the center of the axis increases. Linear Speed increases when the rotational speed increases.

Concept Summary. Circular Motion Terms  The point or line that is the center of the circle is the axis of rotation.  If the axis of rotation is inside.

Force and Motion Terms for the 4 th and 5 th grade.

Applied - Finau. What is circumference? Equation?  Distance around a circle  C = 2πr  π ≈ 3.14  r = radius – distance from center of circle to edge.

Based on your knowledge and everything we have seen in this class, How would you relate Thanksgiving to Physics?

Circular Motion. Rotation vs. Revolution Rotation – when an object turns about an internal axis. – Think of this as spinning Revolution – when an object.

Bell Ringer In terms of energy, what happens to the energy of an object in free-fall?

Circular Motion.

Ch 8 : Rotational Motion .

Uniform Circular Motion

Circular Motion Chapter 9.

Circular motion.

March 2, 2011 Day 21 Topic: Uniform circular motion

Uniform Circular Motion

Circular Motion Q: What makes you dizzy on a rollercoaster ride?

Circular Motion Unit III Chapter 9.

Presentation transcript:

Warmup Be prepared to answer the following: 1)What is required to turn an object travelling in a straight line? 2)What is required to rotate a stationary object? 3)What is the difference between a rotation and a revolution, and how are they related to different kinds of velocities?

Rotational Motion DECEMBER 12 TH, 2011

Rotational Motion Summary 3 v v  Angular Velocity Linear Velocity v = r  Centripetal Acceleration Centripetal Force

Rotational Motion Summary Torque (F t = Fd) Center of mass and stability Torque is a twisting force that causes an object to rotate. Unlike Work, the Force and the Distance in Torque are in perpendicular directions. A center of mass is the average point of mass in an object. It’s possible to be located outside the object! Stability is determined by whether or not the center of mass is above the confines of the supporting base. Unstable Stable

Rotational Motion Summary Linear MotionCircular Motion I = m I = mr 2 p = m*vp a = mr 2 ω Compare: Force causes linear acceleration. Torque, which is based on leveraged force, causes rotational acceleration, therefore, the radius of the mass as compared to the center of mass is a factor in rotational inertia and rotational momentum.

Centripetal vs. Centrifugal 1 Car going around a curve. You are sitting on the seat next to the outside door. What is the direction of the resultant force on you as you turn? Is it away from center or toward center of the turn? Force ON you is toward the center. FcFcFcFc

Centripetal vs. Centrifugal 1 (cont.) There is an outward force, but it does not act ON you. It is the reaction force exerted BY you ON the door. It affects only the door. The centripetal force is exerted BY the door ON you. (Centrally) FcFc F’Reaction

Centripetal vs. Centrifugal 2 Disappearing platform at fair. R What exerts the centripetal force in this example and on what does it act? The centripetal force is exerted BY the wall ON the man. A reaction force is exerted by the man on the wall, but that does not determine the motion of the man. FcFcFcFc

Centripetal vs. Centrifugal 3 How is the water removed from clothes during the spin cycle of a washer? Think carefully before answering... Does the centripetal force throw water off the clothes? NO. Actually, it is the LACK of a force that allows the water to leave the clothes through holes in the circular wall of the rotating washer.

Study Sequence 10 1)Make flashcards for units and study with a partner until you’re confident you can match them at 100% accuracy. 2)Practice conversions using dimensional analysis. Make sure you know the most commonly-used prefixes in the metric system (kilo, centi, milli, deci, deca) 3)Practice simplification of algebraic expressions (Algebra, Chapter 2, try a few problems from each section, check answers in the back) 4)Practice momentum and energy problems (Physics, Chapters 9-10)