DO NOW reminder bell ringer qs should be
DO NOW reminder: bell ringer q’s should be copied or in complete sentences What you need for class: 1. pencil 2. composition n. b. 3. glue stick • When riding a roller coaster, an electric motor pulls the roller coaster to the top of the first hill. What force pulls the roller coaster down the hill? A. friction B. speed C. gravity D. mass
Acceleration Grab an “Identifying variables” worksheet of chair and begin working on it. • Once you have completed the worksheet you have silent hw/reading time. • You will not be in acceleration on early release. You will switch teachers at the end of the week.
Acceleration 9. 8. 16 To be completed today: 1. Hypothesis (needs to be if, then statement) 2. Parachute sketch (should be 2 sketches so I can tell what variable is changing) 3. Make first parachute
Advisor/Advisee • Have a seat at the desk with the number that matches the one next to your name. 1. Peter Adams 2. Jamie Baskett 3. Kirsten Haney 4. Varen Birt 8. Victoria Black 9. Andrea Brown 10. Ariana Carroll 14. Emma Ellis 15. Ava Grier 16. Hayden Beck 20. Carrington Harris 21. Emily Jones 22. Kaleb Mc. Kie 23. Bailey Mc. Nair 25. Sherri Norris 26. Visin Roberts 27. Hannah Waterman
DO NOW reminder: bell ringer q’s should be copied or in complete sentences What you need for class: 1. pencil 2. composition n. b. 3. glue stick • Take our your bell ringer sheet and write Weather Day/No School for Friday. • Pass up your completed bell ringer sheet. The person at the front of each row is responsible for placing sheets in metal tray.
Vocabulary definitions glue to page 12 when complete • Force: a push or pull • Speed: the rate at which someone or something is able to move or operate. • Acceleration: Increase in the rate of speed of something. • Velocity: Speed & Direction • Inertia: A tendency to do nothing or remain unchanged • Unbalanced forces: When unequal forces cause the object(s) to move • Balanced Forces: When 2 equal forces act on an object. Generally does not move. • Friction: Resistance when the surface of an object move over another surface. • Work: Amount of energy transferred by a force
Force and Motion Day 1 Motion, force, and mass
Standard: 8. P. 2 The student will demonstrate an understanding of the effects of forces on the motion and stability of an object. (Physical Science)
8. P. 2 A. 1 Plan and conduct controlled scientific investigations to test how varying the amount of force or mass of an object affects the motion (speed and direction), shape, or orientation of an object.
Prior Knowledge • 2. P. 4 (Effects of pushes, pulls, and friction on the motion of objects) • 5. P. 5: (The factors, i. e. a change of force, a change in mass, or friction, that affect the motion of an object)
Essential Question What is motion?
Essential Question How do I know if an object is in motion?
Essential Question What is force?
Essential Question What is mass?
Motion • What is motion? – A change in the position of an object over time. • How do you know something has moved? – You use a reference point! • A stationary (not moving) object such as a tree, street sign, or a line on the road. Did the beaver move?
• What causes an object to move? – A FORCE! – ALL motion is due to forces acting on objects! • What is a force? – A push or a pull FO RC E MOTION
The total combination of the forces acting on an object is called NET FORCE. YES! Example: Gravity is pulling you down to Earth, the ground is supporting you, and your legs moving you forward as you run during PE. Can more than one force act on an object at the same time? #3 #1 #2
Mass • Mass is how much matter is in something. – You can physically touch matter. – The more matter there is, the more something will weigh. – It is not the same as weight -amount of gravity pulling on an object. • It’s harder to make a large object move or change the speed and direction of it when it’s moving.
Questions • What happens when I throw a baseball and a bowling ball with the same force? • Which one speeds up faster and why?
Check for Understanding: • How is it possible for a 70 -kg football player to knock down a 110 -kg player? The smaller player usually must be running faster. Mass makes a difference when two objects collide, but the speed of the objects also matters. Explore the behavior of colliding objects in this lab.
Lab Directions: Space yourself about 6 feet away from a partner. 1. Slowly roll a tennis ball on the floor toward your partner. Have your partner roll a tennis ball quickly into the tennis ball. What happens? 2. Slowly roll a base ball on the floor toward your partner. Have your partner roll a tennis quickly into the baseball. What happens? 3. Roll one tennis ball and the other student roll to hit the tennis ball with your ball what happened to both tennis balls? 4. Roll the base ball and hit it with the tennis ball and record what happens
Lab: Findings • What happened when you rolled the fast moving tennis ball into the slow moving tennis ball? • What happened when you rolled the fast moving baseball into the slow moving tennis ball? • What happened when you rolled two tennis balls into each other at the same speed?
DO NOW 9. 8. 16 reminder: bell ringer q’s should be copied or in complete sentences What you need for class: 1. pencil 2. composition n. b. 3. glue stick Reminder: be sure to update your T. O. C. daily and if you are absent to get missing assignments from student station • The property of matter that resists changes in motion is called… a. Inertia b. Friction c. Gravity d. Weight (*use vocabulary foldable to help you)
Force and Motion Day 2 Force, mass and motion
Force Review • If an object is in motion and more force is applied to it, the object will begin moving faster. • If two objects have the same mass and a greater force is applied to one of the objects, the object which receives the greater force will change speeds more quickly. – Example – hit a ball harder it speeds up
Force Review • If an object must be slowed down quickly, the force applied to the object must be greater than what is needed for a gradual slowing down. – Example: bicycle brakes
Force Review • Varying the amount of force applied to a moving object can also change the direction that the object is moving more or less quickly. – Example – baseball will change direction when hit by a bat
Mass Review • If a heavy (more massive) object is in motion, more force must be applied to get the object moving faster. • If the same force is applied to two objects, the object with the smaller mass will change speeds more quickly. – For example if a baseball and a bowling ball are thrown with the same force the baseball will speed up faster.
Mass Review • In order to slow down or stop a heavier (more massive) object, the force on that object must be greater than for a less massive object. – Example – a small car will slow down more quickly than a large truck • It is more difficult to change the direction of a heavy moving object, than one that is lighter in mass.
The amount of matter in an object How much force gravity pulls on an object Weight depends on location of object Newtons (N) scale Yes on Earth once you leave Earth your weight will change, but your mass will remain the same Always constant (same) no matter the location. g, kg, mg Balance
Lab: marble Forces and Motion page 471 • Lean 2 meter sticks parallel, less than a marble width apart on 3 stacked books. This is your ramp. • Tap a marble so it rolls up the ramp. Measure how far up the ramp it travels before rolling back. • Repeat step 2 using 2 books, 1 book, 0 books. The same person should tap with the same force each time. • Make a table to record the motion of the marble for each ramp height.
Forces and Motion Lab Marble Roll Height I N C H E S Number of Books Stacked
Question • What would happen if the ramp were perfectly smooth and level?
Exit Slip • Explain how changes in mass effect the motion of an object.
Force and Motion Day 3 Force, mass and motion review Balanced and Unbalanced forces
Review • True or False If an object is in motion and more force is applied to it, the object will begin moving faster.
True or False • If an object must be slowed down quickly, the force applied to the object must be greater than what is needed for gradual slowing down or stop
Mass • If a heavy (more massive) object is in motion, more force must be applied to get the object moving_______. (Faster/slower)
True or False • It is more difficult to change the direction of a heavy moving object, than one that is lighter in mass.
DO NOW 9. 12. 16 reminder: bell ringer q’s should be copied or in complete sentences What you need for class: 1. pencil 2. composition n. b. 3. glue stick Reminder: be sure to update your T. O. C. daily and if you are absent to get missing assignments from student station The change in position of an object compared to a reference point. A. displacement B. distance C. motion D. position (*use vocabulary foldable to help you)
8. P. 2 A. 2 • Develop and use models to compare and predict the resulting effect of balanced and unbalanced forces on an object’s motion in terms if magnitude and direction.
Essential Question What are balanced forces?
Essential Question What are unbalanced forces?
Essential Question How do balanced and unbalanced forces effect the direction of an object?
Essential Question How do balanced and unbalanced forces effect net force(magnitude)?
Balanced Forces • A balanced force is one in which the net force equals ZERO. • Do you think there will be any motion? – NO! • Examples: 25 Newtons
Unbalanced Forces • An unbalanced force is one in which the net force is greater than zero. • Do you think there will be any motion? – YES! • Examples: 50 N 25 Newtons 40 Newtons 2 N
Only an ________ force can change the motion of an object. • Example: Your dog can cause you to move if he pulls with enough force. – His force is greater than the force you’re using to stay in place
What would happen if an unbalanced force acted on an object that’s already in motion? • It will change the speed or direction of the object. • Example: Your little brother is riding his tricycle. You run up behind him and give him a push. – Your force adds to the existing force causing him to speed up.
Unbalanced forces can act in the same direction. • Example: You’re pushing a cabinet across the room with a force of 15 N. You’re friend is pulling with a force of 10 N. • What is the NET FORCE? • What direction is the cabinet moving? 15 Newtons 10 Newtons
Unbalanced forces can act in opposite directions. • • • Wh en Example: Two dogs are tugging for you hon a rope. ave and the s, t 20 N the ceof One dog pulls with a force opp he o b dire osing jec other pulls with a forcetheof 25 N. ctio sam t mo What is the NET FORCE? the l e dire ves is n arg in ctio e n What direction is the rope moving? r fo rce as. 20 Newtons 25 Newtons
Forces Balanced forces= Unbalanced forces= Net force: