Welcome to Earth & Physical Science (EPS)

Welcome toEarth & 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). • Take out a pencil, paper, eraser. • Blue sheet, CB, safety contract if you have them! • Remove all other items from desk. • Complete EPS Pretest: Mathematics • 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!!): “What are your math strengths and areas to improve (weaknesses).”

Today’s Agenda Newton’s Second Law: • Warm-Up: EPS pretest: Mathematics • Review Starter & Homework, Wiki Site • Problem Solving Algebraically – GUESS (SO 2) • 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) • Activity: “Think & Do” (TX pg 53, #1-#3) • Newton’s 2nd Law Problem Set (WB 9)

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

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

IV & DV PracticeClass Discussion • The more water we use, the less there is in the reservoirs. • The more soap I use, the more suds I get. • My grades go up when I spend more time doing homework. • 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. • Review HAUS Process (“Questions, Concerns, or Comments”) • Discussion, Pair-Share/Answers

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

Write the question here

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/s2. • 6. A block pushed with a force of 13.5 N accelerates at 6.5 m/s2 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. • 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?”

CO1: Velocity • Speed of an object • 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 a = ∆ v /time a = (v2 - v1)/time

CO 1: Acceleration vs. Velocity Acceleration: rate of change in velocity. • a change in speed, • a change in direction, or • 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) • Similarities: • Differences:

CO 2: Force & Acceleration (3.2 pp 40-41) • 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.

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

CO 2: Force & Acceleration • Tug of War: • Balanced when both sides have equal force (strength). • 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. • Mass remains the same on Earth, the moon, or an orbiting space shuttle.

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

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

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

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

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

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

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

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

Welcome to Earth & Physical Science (EPS)