Frames of Reference Caution: Your brain is about to be twisted! KL phys 09 Science is nothing but perception. Plato Plato There is no fixed physical reality,

Slides:

Advertisements

Similar presentations

Car on an exit ramp a classic rotational motion & friction problem Rhine.

Advertisements

Newton’s 1st Law of Motion

Newton’s Laws Review game.

Forces and Motion Demonstrate and calculate how unbalanced forces change the speed or direction of an objects motion.

Do Now If you are sitting still in your seat on a bus that is traveling 100 km/h on a highway, is your body at rest or in motion? Explain your answer.

Newton’s First Law of Motion Newton’s First Law of Motion.

Motion.  Motion: The change in position of an object as compared with a reference point  Reference point: System of objects that are not moving (stationary)

 Velocity differs from speed in that we also know the direction of the moving object.  Velocity is both speed and direction.  Velocity is a vector.

Newton's First Law of Motion

Chapter 2, Part 2 September 5, 2005 (Happy Labor Day)

Uniform and non-uniform circular motion Centripetal acceleration Problem solving with Newton’s 2nd Law for circular motion Lecture 8: Circular motion.

ENGR 215 ~ Dynamics Sections 13.1 – Newton’s Three Laws of Motion First Law –a particle originally at rest, or moving in a straight line with constant.

Chapter 7 Tangential Speed

Newton’s Laws of Motion. Dynamics and Forces Dynamics: Connection between force and motion. Explains why things move. Dynamics: Connection between force.

Forces and Newton’s Laws of Motion

Change in Motion Motion When something moves, its in motion. Motion is change in an object’s position. A motionless object is at rest or stationary.

Motion.  Motion is a change in position Frame of Reference  A place or object that is fixed (not moving)  Ex: A bus is driving by.  Your reference.

Newton’s 3 Laws of Motion. Newton’s first Law The Law of Inertia An object Stays in the state of rest or motion unless acted on by another force.

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Chapter 7 Circular Motion and Gravitation.

Newton’s 1 st Law Inertia. Force  Any push or pull acting on an object  Most forces require contact between two objects (Contact Forces) Ex. Motor lifts.

What keeps the Earth spinning? Now that we have a better understanding of motion (speed, velocity, acceleration, etc.) we need to investigate the ideas.

Uniform Circular Motion. Motion in a Circle Revolution: If entire object is moving in a circle around an external point. The earth revolves around the.

Circular Motion KCHS Physics.

Circular motion.

Chapter Six: Laws of Motion

Newton’s Second Law of Motion

Physics First! Unit 1, Chapter 3.

1 200 pt 300 pt 400 pt 500 pt 100 pt 200 pt 300 pt 400 pt 500 pt 100 pt 200 pt 300 pt 400 pt 500 pt 100 pt 200 pt 300 pt 400 pt 500 pt 100 pt 200 pt 300.

Newton’s first law. Objectives State Newton’s first law and explain its meaning. Calculate the effect of forces on objects using the law of inertia. Explain.

Teacher notes: EQ: How does motion (even constants) Change depending on how you look at it? We will discuss what a frame of reference is, and how it effects.

1.5 Frames of reference. Imagine… Your friend and yourself have set up a small experiment on your spare time, because you have nothing better to do Your.

 An object at rest tends to stay at rest and an object in motion tends to stay in motion with the same speed and in the same direction unless acted.

Dynamics: Newton’s Laws of Motion

Unit Two: Dynamics Section 2: Newton’s First Law of Inertia.

Newton’s Laws of Motion

1 10 pt 15 pt 20 pt 25 pt 5 pt 10 pt 15 pt 20 pt 25 pt 5 pt 10 pt 15 pt 20 pt 25 pt 5 pt 10 pt 15 pt 20 pt 25 pt 5 pt 10 pt 15 pt 20 pt 25 pt 5 pt Labels.

Forces and Motion What is Motion?

& ForcesForces. Isaac Newton Isaac Newton (1642–1727) Isaac Newton proposed that the tendency of an object was to maintain in its current state of motion.

- Review velocity, acceleration and the conditions needed to cause acceleration - Observe and plot the change in acceleration of a rolling object with.

Section 4-4. Tendency of an object to stay at rest or in motion. Because of inertia, an object at rest tends to stay at rest and an object in motion tends.

Section 2: Newton’s First Law of Inertia

Check for Understanding Acceleration. Name 3 situations in which an object would be accelerating

1 Newton’s Second Law: Motion in a Circle Readings: Chapter 8.

 Acceleration: is the change in velocity divided by the time it takes for the change to occur. (A V T)  Like velocity, acceleration has a direction.

Equations of Motion Review of the 5 Equations of Motion.

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

Laws of Motion Newton’s First Law. Force changes motion A force is a push or pull, or any action that is able to change motion.

Inertial and Non-Inertial Frames of Reference

Applied Science III- Finau. What causes motion? For example, what causes a book to slide across a table? Or a flag moving up a flagpole?  A push?  A.

Newton’s first law. Objectives State Newton’s first law and explain its meaning. Calculate the effect of forces on objects using the law of inertia. Explain.

 Velocity differs from speed in that we also know the direction of the moving object.  Velocity is both speed and direction.  Velocity is a vector.

Motion Graphs. Interpret The Graph Below: The graph shows an object which is not moving (at rest). The distance stays the same as time goes by because.

Section 2 Newton’s Laws of Motion

Newton’s First Law of Motion

Speed & Velocity.

Chapter 7 Objectives Solve problems involving centripetal force.

ACTIVITY #46: NEWTON’S LAWS OF MOTION

Newton’s 3 laws of motion

Figure 6.1 Overhead view of a ball moving in a circular path in a horizontal plane. A force Fr directed toward the center of the circle keeps the ball.

Chapter 4 Section 2 Newton’s First Law Objectives

Frames of Reference IFORs and NIFORs

Reference Frames Galilean Transformations Quiz Outline.

Interpreting Motion Graphs

Forces at an angle: Saying goodbye to N=mg

Newton’s Laws of Motion

Newton’s First Law of Motion

Inertial and Non-Inertial Frames of Reference

Lesson 2 Newton’s First Law Chapter Menu.

Motion and Forces.

Presentation transcript:

Frames of Reference Caution: Your brain is about to be twisted! KL phys 09 Science is nothing but perception. Plato Plato There is no fixed physical reality, no single perception of the world, just numerous ways of interpreting world views as dictated by one's nervous system and the specific environment of our planetary existence. Deepak Chopra There are children playing in the streets who could solve some of my top problems in physics, because they have modes of sensory perception that I lost long ago. J. Robert Oppenheimer J. Robert Oppenheimer

Consider this… You are sitting in the passenger seat of your friend’s car. The speedometer reads 30 mph. How fast are you moving? How fast is your friend moving? You pass a friend standing on the corner. How fast is he moving?

The reality is that your motion affects what is seen. Motion is relative!

Your (the passenger) point of view You are sitting in the passenger seat of your friend’s car. The speedometer reads 30 mph. How fast are you moving? v=0 mph How fast is your friend moving? v=0mph You pass a friend standing on the corner. How fast is he moving? v=-30 mph ( 30 mph backwards)

The driver’s point of view You are sitting in the passenger seat of your friend’s car. The speedometer reads 30 mph. How fast are you moving? v=0 mph How fast is your friend moving? v=0 mph You pass a friend standing on the corner. How fast is he moving? v = -30 mph (30 mph backwards)

Your friend on the corner’s point of view You are sitting in the passenger seat of your friend’s car. The speedometer reads 30 mph. How fast are you moving? v=30 mph How fast is your friend moving? v=30 mph You pass a friend standing on the corner. How fast is he moving? v = 0 mph

From the point of view of a car moving along at 20 mph as you pass the slow poke. You are sitting in the passenger seat of your friend’s car. The speedometer in your friend’s car reads 30 mph. How fast are you moving? v=0 mph How fast is your friend moving? v=0 mph How fast is the car you passed moving ? v=-10 mph For the 2 cars moving in the same direction the relative velocity is found by subtraction and the +/- depends on the reference point.

From the point of view of a car coming head on towards you at 20 mph You are sitting in the passenger seat of your friend’s car. The speedometer in your friend’s car reads 30 mph. How fast are you moving? v=0 mph How fast is your friend moving? v=0 mph How fast is the car coming towards you moving ? v= -50 mph For the 2 cars moving in the opposite directions the relative velocity is found by addition and the +/- depends on the motion towards or away from a reference point.

Example: Your friend tosses a ball upwards while riding in a car Does the FBD change if the ball is on its way towards the ceiling? at the top of its trajectory? on its way back down? moving sideways? Weight

Example: Your friend tosses a ball upwards while riding in a car What path do you see? If you are at rest (standing on the corner) and the ball moves sideways. If you are in the car with the ball moving together. Weight

Frames of Reference Inertial – Objects obey the law of inertia. Constant velocity (Constant speed, straight line) Non-inertial Explanations cause you to create “fictitious” forces because you want to believe Newton’s 1 st law. Accelerated motion What you think is true is exactly opposite what is truly happening.