Forces and Motion Mrs. Anna Ward James Martin MS

Do Now!!! Copy this down in a new page of your science notebook: UNIT OUTLINE: ◦ Chapter 1—Motion ◦ Chapter 2—Forces ◦ Chapter 3—Gravity, Friction, and Pressure ◦ Chapter 4—Work and Energy ◦ Chapter 5—Machines

Announcements Welcome Back from Spring Break!!! Today starts Fourth Quarter!!! ◦ It is the PERFECT time to start fresh and get organized!!!! Days to EOGs

Agenda for the Week… Today we begin our last major unit of study together: “FORCES AND MOTION” For the next three class sessions, we are going to cover some of the major concepts of motion, such as: ◦ What is Motion? ◦ What are Speed and Velocity? ◦ What is Acceleration? ◦ Why is knowing about all this important?

Agenda for the week For this unit, I am going to try to have at least one mini lab per day to get you up and out of your seat “DOING SCIENCE” You must have exceptional behavior and use your quiet partner voices for this to work. REMEMBER: You all want science to be fun, but it has to be a safe and orderly environment. Many of the materials (cars, balls, etc.) I have borrowed from my children’s toy basket. PLEASE TAKE EXCEPTIONAL CARE OF THESE ITEMS. Lost or stolen materials = NO MORE LABS

Agenda for the Unit… In addition to mini-labs, Friday you will have an outside lab on the track. In order to earn this privilege, you will need to meet class expectations as well as complete a pre-lab sheet I will continue to do this every week if allowed by the school and as your behavior and attitude warrant. These lessons will explain the unit using different sports…I think you guys will love it, so please do your best to exceed expectations daily

Today we are going to… Learn some of the very basic vocabulary ◦ Position, Motion, Distance, and Speed Watch a couple of videos Take some guided notes Participate in a Mini-Lab Learn how to calculate speed

Preview of what we are going to talk about this week…. x.cfm?guidAssetId=CDA9C235-0EC4- 4CA5-A713- B920EBD189D2&blnFromSearch=1&prod uctcode=DSCE x.cfm?guidAssetId=CDA9C235-0EC4- 4CA5-A713- B920EBD189D2&blnFromSearch=1&prod uctcode=DSCE

Thinking together…. SILENTLY each person should chose an object in the room… SILENTLY think of how you could describe to another person how to get to that object from the classroom door…. With the person next to you, try to guess each others’ objects by giving your directions to that object (DON’T SAY THE OBJECT’S NAME!!!!)

Position POSITION is the location of a place or object. Often you describe where something is by comparing its position with that of something else Can someone describe how they used this technique in the last exercise?

Reference Points Each time you identify the position of an object, you are comparing the location of the object, you are comparing the location of the object with another location or place The object or location to which you compare other objects or locations is called a REFERENCE POINT.

Video: x.cfm?guidAssetId=514D72E8-8C86- 4CFE-8FC0- 044F1A32DBAA&blnFromSearch=1&pro ductcode=US x.cfm?guidAssetId=514D72E8-8C86- 4CFE-8FC0- 044F1A32DBAA&blnFromSearch=1&pro ductcode=US

Distance DISTANCE is the measurement of two positions In science, we measure distance in METERS ◦ Kilometers for long distances ◦ Centimeters for short distances

Distance can be either straight line or a measure of a path taken… Question: How would the distance of the path of this maze be different from a straight line measurement?

MOTION… MOTION is the change of position over time. Motion can be either: VERTICALHORIZONTAL

SOME IMPORTANT THINGS TO NOTE…. Motion does NOT indicate how quickly something changed position ◦ This is SPEED, something we will learn in a moment Motion can change direction

Check for Understanding… 1. What is the name for the location of a place or object? 2. How does scientists measure distance? 3. Motion can be __________ or ______________. 4. The location or object to which you compare other objects or locations is the ____________.

Finally, what is speed??? Speed is a “rate of motion” It is measured as a distance over time SPEED = DISTANCE TIME ◦ Or speed = m/s

Mini-Lab: How can you measure speed? I need volunteers to raise their hands who have iPODS, smart phones, or any tool that has a stopwatch feature. YOU WILL BE THE TEAM CAPTAINS.

Mini-Lab: How can you measure speed? Turn to page D16 in the textbook. You will work with in groups of 3 to complete the short task “EXPLORE SPEED”. You have 5 minutes to complete this and turn in the “WHAT DO YOU THINK?” questions as part of your exit ticket. 2 people to roll balls Team Captain will use stopwatch to record time.

DISCUSSION: SPEED You actually already know a great deal about speed. What does the speed limit on the road stand for? MILES PER HOUR Or miles hour Remember our formula for speed?

Calculating Speed A wheelchair racer completes a 100 meter course in 20 seconds. What is his speed? I will demonstrate how I calculate this on the white board.

Calculating Speed If a car travels 400 meters in 20 seconds how fast is it going? Answer: 20 m/s

EXIT TICKET 1. Ms. Johnson’s class is 10 meters away. If it takes you 8 seconds to get there, what is your speed? 2. The Gym is 100 meters away. If it takes you 90 seconds to walk there, what is your speed?