Coefficient of Friction

Slides:

Advertisements

Similar presentations

Aim: More friction Do Now:

Advertisements

Kinematics- Acceleration Chapter 5 (pg ) A Mathematical Model of Motion.

Newton’s Second Law Physical Science 3.1. Force and Acceleration Greater force = greater acceleration Greater force = greater acceleration Applying force.

This Week’s Lab 11/13/13 – 11/15/13. Title [Title – you need to come up with one] Your name and period.

PHY131H1S - Class 11 Today: Friction, Drag Rolling without slipping Examples of Newton’s Second Law Microscopic bumps and holes crash into each other,

Motion & Force: Dynamics Physics 11. Galileo’s Inertia  Galileo attempted to explain inertia based upon rolling a ball down a ramp  Predict what would.

Physical Science State Assessment Review S.HS.2B.1.1.

Friction and Gravity.

Newton’s first law of motion states that the motion of an object changes only if an unbalanced force acts on the object. Newton’s second law of motion.

Motion, Acceleration, and Forces Physical Science

Chapter 5 Newton’s Second Law of Motion – Force and Acceleration

Rolling Ball. To Start Off Materials Needed: Incline plane (binder), Tennis ball, Baseball, solid object.

Newton’s Laws of Motion

Gravity on a Roll Gravity Rules! And Gravity Always Wins.

Friction Objectives –Make simple measurements of distance and time –Learn graphing skills and understand graphical relationships –Understand the meaning.

Types of Friction.

Chapter 3: Forces Section 1:Newton ’ s Second Law Force, Mass, and Acceleration Newton ’ s Second Law Friction Air Resistance.

Forces Newton’s Second Law.

Kinematics- Acceleration Chapter 5 (pg ) A Mathematical Model of Motion.

Kahoot. Question 1 A packing crate slides down an inclined ramp at constant velocity. Thus we can deduce that.

5.1 Forces in 2-D; Vectors. 5.1 Summary When two vectors are at right angles, you can use the Pythagorean theorem to determine the magnitude of the resultant.

Science Investigations.  A push or pull on an object  Units: Newton (N) = 1 kg x m/s 2  Net Force (Fnet) : sum of all of the forces that are acting.

By: Hanna Briestensky Problem Determine how the height from which the ball is dropped, effects how high that the ball will bounce back up.

Friction Ffriction = μFNormal.

Motion in One Direction Chapter 2 Goals: motion, displacement, velocity, acceleration, freefall, acceleration due to gravity and equations to solve for.

If the sum of all the forces acting on a moving object is zero, the object will (1) slow down and stop (2) change the direction of its motion (3) accelerate.

By: Will Schubert. Determine how the height you drop a ball from affects the height the ball bounces back up. Problem.

Chapter 10: Motion Observing Motion Reference point: stationary object from which motion is observed Motion involves distance, time and direction Displacement.

 Friction – force that opposes motion  Caused by microscopic irregularities of a surface  The friction force is the force exerted by a surface as an.

Physical Science Forces

Mr.Rockensies Regents Physics

Friction and Normal Forces

Let’s Play Review Jeopardy!. Velocity Problems Motion Vocab. Acceleration Problems $100 $200 $300 $400 $500 $400 $500.

Forces, Forces Everywhere An investigation of frictional forces around us.

Frictional Forces This topic may be abrasive. Friction Friction is a force that opposes motion Friction will cause a moving object to slow down and finally.

Newton’s Second Law of Motion Virginia PS SOL.10b.

Period 2 Question 1.

Forces and Laws of Motion Force Force is the cause of an acceleration, or the change in an objects motion. This means that force can make an object to.

Kinematic Equations Chapter 2 Section 2. Accelerated Motion  Motion with constant acceleration is what we will mostly look at in this class  Example:

Chapter 12 Review a d 13 kg b c A box is accelerated to the right across the smooth surface of a table with an applied force of 40 Newtons. The table surface.

Friction Static and Dynamic.

Test Review Dynamics.

Cart on Ramp Lab.

NEWTON’S SECOND LAW OF MOTION (Ch. 3-1)

Forces to recon with!.

Coefficient of Friction

Not enough information

Whiteboarding Please form a group of 2 or 3

Graphing exercise Phet Simulation.

Ch. 5 slides Forces.ppt.

Physical Science Ms. Pollock

Types of Friction.

Coefficient of Friction

Lab – Investigating Acceleration

Relative Velocity Pre-Class Friday

Types of Friction.

Ch. 6 slides.ppt Forces2.ppt.

Rolling Friction.

Coefficient of Friction

Devil physics The baddest class on campus aP Physics

Coefficient of Friction

Devil physics The baddest class on campus AP Physics

Calculating Acceleration

Final Velocity and Acceleration Equations

rate at which velocity changes

2*7 Frictional Force: The Mu of the Shoe

Accelerated Motion v.

Coefficient of Friction

Presentation transcript:

Coefficient of Friction Setting up and executing an experiment.

QPOE2 What do you know about the given question How will you apply what you found Question Application Knowledge probe Explanation Evaluate Prediction Data Analysis Investigation plan Observation How will you analyze your data How will you investigate the question

QUESTION Which of the following objects has the greatest coefficient of rolling friction between itself and the carpet floor?

What have we learned that would help us answer this question What have we learned that would help us answer this question? Cart project: the cart stopped because of rolling friction between the wheels and the surface of contact (carpet and wooden floor). Without a breaking system, the negative acceleration (deceleration)is constant or uniform. Those that did have a breaking system had greater friction (sliding friction)once the breaking system kicked in.

What have we learned that would help us answer this question What have we learned that would help us answer this question? The coefficient of static and sliding friction activity showed us that we can calculate m by dividing the friction force by the normal force (mass x acceleration due to gravity).

Equations of Motion for Uniform Acceleration Equations Variables vf = vi + at vi vf a t d = ½ (vf + vi) t vi vf d t d = vit + ½ at2 vi a d t vf 2 = vi 2 + 2ad vi vf a d

Knowledge Probe What do we know about friction? How do we calculate the coefficient of friction? Which kinematic equations would help us? What materials do we need? What values are we going to measure? What types of errors should will we encounter? How many measurement should we take?

PREDICTION Which object would have the greatest coefficient of rolling friction between itself and the carpet floor? Why? Justify your prediction.

Investigative plan Determine the procedures with which we can obtain the values needed in the knowledge probe which in turn will answer the QUESTION. Material list: ball, scale, ramp, stopwatch, meter stick, tape, carpeted area, pencil and paper, calculator Procedure: 1. 2. 3. 4. 5. 6. 7. 8.

OBSERVATION What values are measured? How many times do we repeat the trials? Object: Tennis Ball displacement time Trial 1 Trial 2 Trial 3 Trial 4 Trial 5

Data analysis What information can be derived from the observation? Object: Tennis Ball displacement time Initial velocity acceleration Trial 1 Trial 2 Trial 3 Trial 4

EVALUATION Using the acceleration that was calculated rom the data analysis, determine the coefficient of friction. Object: Tennis Ball displacement time Initial velocity acceleration Coefficient m Trial 1 Trial 2 Trial 3 Trial 4

EXPLANATION From the evaluation, ______________ has the greatest rolling coefficient of friction. Offer reasons why the object has the greatest rolling friction. 1. 2. 3. 4.