Forces and Motion

Forces and Motion Mrs. Anna Ward James Martin MS

Do Now!!! Page 1 • UNIT OUTLINE: • Chapter 1—Motion • Chapter 2—Forces • Chapter 3—Gravity, Friction, and Pressure • Chapter 4—Work and Energy • Chapter 5—Machines

Announcements • Spring Break…only four more days! • Behavior and Academic Expectations • Multiple Choice Tests • Days to EOGs 34

Agenda for the Week… • Today is the official beginning of 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, Thursday you may have an outside lab. • In order to earn this privilege, you will need to meet class expectationsas well as complete a pre-lab sheet • I will continue to do a super fun activity at the end of every week if as your behavior and attitude warrant me doing so.

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…. • http://player.discoveryeducation.com/index.cfm?guidAssetId=CDA9C235-0EC4-4CA5-A713-B920EBD189D2&blnFromSearch=1&productcode=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: • http://player.discoveryeducation.com/index.cfm?guidAssetId=514D72E8-8C86-4CFE-8FC0-044F1A32DBAA&blnFromSearch=1&productcode=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: VERTICAL HORIZONTAL

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… • What is the name for the location of a place or object? • How does scientists measure distance? • Motion can be __________ or ______________. • 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? • iPods, Smart Phones • Expectations

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?

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

EXIT TICKET • Ms. Ogletree’sclass is 10 meters away. If it takes you 8 seconds to get there, what is your speed? • The Gym is 100 meters away. If it takes you 90 seconds to walk there, what is your speed?

Forces and Motion