Welcome to Earth & Physical Science (EPS) Unit 1, Day 3 (F 8/27, M 8/30) Newton’s Second Law SO 1, CO 1-3

Bell Starter Turn in homework to folder (B Classes). Turn in homework to folder (B Classes). Take out a pencil, paper, eraser. Take out a pencil, paper, eraser. Blue sheet, CB, safety contract if you have them! Blue sheet, CB, safety contract if you have them! Remove all other items from desk. Remove all other items from desk. Complete EPS Pretest: Mathematics Complete EPS Pretest: Mathematics Score will be recorded in grade book. Score will be recorded in grade book. When done, reply to the question in your IN (upper left side of CB-remember to put the date!!): When done, reply to the question in your IN (upper left side of CB-remember to put the date!!): “What are your math strengths and areas to improve (weaknesses).”

Today’s Agenda Newton’s Second Law: Warm-Up: EPS pretest: Mathematics Warm-Up: EPS pretest: Mathematics Review Starter & Homework, Wiki Site Review Starter & Homework, Wiki Site Problem Solving Algebraically – GUESS (SO 2) Problem Solving Algebraically – GUESS (SO 2) Introduction Acceleration, Force, Mass (Notes) Introduction Acceleration, Force, Mass (Notes) Reading: Introduction to: Chapter 3 for Introduction to Newton’s Second Law (3.1, 3.2, and 3.3), (CO 1, CO 2, and CO 3, respectively) Reading: Introduction to: Chapter 3 for Introduction to Newton’s Second Law (3.1, 3.2, and 3.3), (CO 1, CO 2, and CO 3, respectively) Activity: “Think & Do” (TX pg 53, #1-#3) Activity: “Think & Do” (TX pg 53, #1-#3) Newton’s 2 nd Law Problem Set (WB 9) Newton’s 2 nd Law Problem Set (WB 9)

Practice-A Classes “Independent/Dependent Variables” Worksheet (class discussion) “Independent/Dependent Variables” Worksheet (class discussion) “Controls and Variables – Part 1” (homework/HAUS) (WB5-6) “Controls and Variables – Part 1” (homework/HAUS) (WB5-6) Required: IV & DV Required: IV & DV Optional: Control & Conclusion Optional: Control & Conclusion

Welcome Back Please remember NO cell phones and other electronic devices visible in class Please remember NO cell phones and other electronic devices visible in class Cares, Concerns & Celebrations- Cares, Concerns & Celebrations- RAPTOR VICTORIES

IV & DV Practice Class Discussion The more water we use, the less there is in the reservoirs. The more water we use, the less there is in the reservoirs. The more soap I use, the more suds I get. The more soap I use, the more suds I get. My grades go up when I spend more time doing homework. My grades go up when I spend more time doing homework. The kinder I am to people, the kinder they are to me. The kinder I am to people, the kinder they are to me.

Review Homework—B Classes “Scientific Method, Controls and Variables – Part 1” Return homework sheet and transfer grade. Return homework sheet and transfer grade. Review HAUS Process (“Questions, Concerns, or Comments”) Review HAUS Process (“Questions, Concerns, or Comments”) Discussion, Pair-Share/Answers Discussion, Pair-Share/Answers

SO 2: Algebraic Problem Solving Show all your work… Remember to solve problems, you will need to show: GUESS Givens: Givens: Unknown: Unknown: Equation (correct form): Equation (correct form): Substitute (correct numeric form): Substitute (correct numeric form): Solve for answer (include units) Solve for answer (include units) OR NO CREDIT WILL BE GIVEN!

Write the question here GivensUnknownsEquationSubstitutionSolve (units)

SO 2: Algebraic Problem Solving (TB p 53) Copy and show all GUESS components: #3. Calculate the acceleration of a 40 kg crate of softball gear when pulled sideways with a net force of 200 N. #4. Calculate the acceleration of a 2000 kg single-engine airplane just before takeoff when the thrust of its engine is 500 N.

SO 2: Algebraic Problem Solving (more practice, if time allows) Show all your work… 5. Calculate the force needed to push a go-cart with Clark, both have a mass of 100 kg, to accelerate at 45 m/s Calculate the force needed to push a go-cart with Clark, both have a mass of 100 kg, to accelerate at 45 m/s A block pushed with a force of 13.5 N accelerates at 6.5 m/s 2 to the left. What is the mass of the block? 6. A block pushed with a force of 13.5 N accelerates at 6.5 m/s 2 to the left. What is the mass of the block?

CO 3: Mass, Weight, & Inertia Inertia: the tendency of an object to remain at rest or in motion with a constant velocity. Inertia: the tendency of an object to remain at rest or in motion with a constant velocity. Example: The baby will remain in the car seat, unless there is a sudden motion and the baby will continue in the direction of the motion (therefore, buckle up for safety). Example: The baby will remain in the car seat, unless there is a sudden motion and the baby will continue in the direction of the motion (therefore, buckle up for safety). “What is inertia?” “What is inertia?”

CO1: Velocity Speed of an object Speed of an object Direction the object is moving Direction the object is moving

CO 1: Acceleration (3.1 pp 37-40) Acceleration = Any change in velocity divided by the time interval in which the change occurred. Shows direction Shows direction a = ∆ v /time a = (v 2 - v 1 )/time

CO 1: Acceleration vs. Velocity Acceleration: rate of change in velocity. a change in speed, a change in speed, a change in direction, or a change in direction, or a change in both speed and direction. a change in both speed and direction. Remember velocity: the speed (d/t) of an object and specification of its direction of motion.

CO 1: Acceleration vs. Velocity “OUT” Identify the similarities and differences between acceleration and velocity….(two column format) Identify the similarities and differences between acceleration and velocity….(two column format) Similarities: Similarities: Differences: Differences:

CO 2: Force & Acceleration (3.2 pp 40-41) Force = the cause of acceleration, or change in an object’s velocity. Force = the cause of acceleration, or change in an object’s velocity.

CO 2: Force & Acceleration Balanced Forces = forces acting on an object that combine to produce a net force equal to zero. Balanced Forces = forces acting on an object that combine to produce a net force equal to zero.

CO 2: Force & Acceleration Unbalanced Forces = forces acting on an object that combine to produce a net nonzero force. Unbalanced Forces = forces acting on an object that combine to produce a net nonzero force.

CO 2: Force & Acceleration Tug of War: Tug of War: Balanced when both sides have equal force (strength). Balanced when both sides have equal force (strength). Unbalanced when one side provides more force (strength) than the other side. Unbalanced when one side provides more force (strength) than the other side.

CO 2: Force & Acceleration

CO 3: Mass, Weight, & Inertia (3.3 pp 41-43) Mass: Measure of the amount of matter in an object. Measure of the amount of matter in an object. Mass remains the same on Earth, the moon, or an orbiting space shuttle. Mass remains the same on Earth, the moon, or an orbiting space shuttle.

CO 3: Mass, Weight, & Inertia Weight: Weight: Gravitational force an object experiences due to its mass. Gravitational force an object experiences due to its mass. Depends on gravity. Depends on gravity.

CO 3: Mass vs. Weight Video Clip: Hammer vs. Falcon Feather Video Clip: Hammer vs. Falcon Feather Video Clip Video Clip Which will fall first in space? Which will fall first in space?

CO 3: Mass, Weight, & Inertia Mass is a measure of inertia. Mass is a measure of inertia. Video Clip (mass, weight, vs. inertia) Video Clip (mass, weight, vs. inertia) Video Clip Video Clip

CO 3: Mass, Weight, & Inertia “OUT” Identify the similarities and differences between mass, weight, and inertia…. Similarities: Similarities: Differences: Differences:

Activity “Think & Do” Open textbook to page 53. Open textbook to page 53. With a partner complete #1-#2. With a partner complete #1-#2. Take out a piece of paper (1 page/group). Take out a piece of paper (1 page/group). Answer questions in complete sentences. Answer questions in complete sentences. If time allows, complete #3. If time allows, complete #3. On top of page, include your names, title, date, and period. On top of page, include your names, title, date, and period. Due at the end of the period. Due at the end of the period.

Guided Reading & Note Taking Skills Introduction Force, Mass, Introduction Force, Mass, Acceleration (Notes) Reading: Chapter 3 Introduction for Newton’s Second Law (3.1, 3.2, and 3.3) Reading: Chapter 3 Introduction for Newton’s Second Law (3.1, 3.2, and 3.3) Collectively complete CO 1 and CO 2 Collectively complete CO 1 and CO 2 Individually/Collectively complete CO 3 Individually/Collectively complete CO 3 Review CO 3 Review CO 3

Practice/Homework Newton’s 2 nd Law Problem Set (WB 7) Newton’s 2 nd Law Problem Set (WB 7) Complete for homework Complete for homework

What’s Due Next Time? Organize your Composition Notebook and 3-ring Binder. Organize your Composition Notebook and 3-ring Binder. Turn in all missing papers by next time for credit (late work for only one week). Turn in all missing papers by next time for credit (late work for only one week). Controls and Variables-IV & DV ONLY) Controls and Variables-IV & DV ONLY) “Force and Acceleration Calcs” (WB 7) “Force and Acceleration Calcs” (WB 7)