Newtons 2 nd Law Unit 4 Unit 4 Notebook Checklist This paper is 1 on the check list Keep you notebookbinder organized throughout the Unit Section 41 What affects the acceleration of an object ID: 766219
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Newton’s 2nd Law Unit 4
Unit 4 – Notebook Checklist This paper is #1 on the check list. Keep you notebook/binder organized throughout the Unit.
Section 4-1: What affects the acceleration of an object? ( Checklist #2) Review: How do unbalanced forces affect velocity? How does a Non-zero net force affect velocity?
Section 4-1: What affects the acceleration of an object ? (Checklist #2) Draw a Free Body Diagram of the Forces acting on the Cart. What would the motion of the cart be like if it started at rest?
PHET Colorado Net Force Simulator – Note Sheet (Checklist #3) Check List Item #3 PHET Colorado Net Force Simulator – Note Sheet Content Objective : I will review Newton’s 1 st Law of Motion and be able to describe the motion of an object that is experiencing equilibrium. I will also be able to explain how the mass of an object and the force pushing on it will affect the object’s acceleration. Language Objective : I will watch a computer simulation on forces. I will discuss predictions for specific scenarios of motion with a small group of peers. I will then write my observations and compare them to the predictions I made before watching the simulation.
Section 4-1: What affects the acceleration of an object? (Check List #2) Newton’s Second Law Definition The acceleration produced by a net force on an object is directly proportional to the magnitude of the net force, in the same direction as the net force and is inversely proportional to the mass of the object.
Section 4-1: What affects the acceleration of an object? ( Checklist #2) Newton’s 2 nd Law – Mathematically What happens to the value of a fraction when the bottom number gets bigger.
Newton’s 2nd Law Practice Problem Set (Checklist # 4) Example 1 A 0.02 kg sparrow flying toward a bird feeder mistakes a pane of glass in a window as an opening and slams into it with a net force of 2.0 N. Draw a Free Body Diagram of the forces acting on the bird when it hits the window. What is the Net Force acting on the bird? What is the bird’s acceleration?
Newton’s 2nd Law Practice Problem Set (Checklist # 4) Example 2 A weightlifter accelerates a 50 kg barbell over their head at a rate of 2.4 m/s 2 . Draw a Free Body Diagram of the forces acting on the barbell. What is the Net Force acting on the Barbell? How much does the barbell weigh? How much force does the man need to apply to the barbell to make it accelerate upward at this rate?
Newton’s 2nd Law Practice Problem Set (Checklist # 4) Example 3: Three passionate brides are fighting over a wedding dress. The first bride pulls on the dress with a force of 89 N east, a second bride pulls 52 N south and the final bride pulls on the dress with a force of 50 N west. Draw a free body diagram of the forces acting on the dress. What is the magnitude of the net force acting on the dress? If the dress has a mass of 1.5 kg, how fast will the dress begin to accelerate when the brides pull on it?
Newton’s 2nd Law Lab (Checklist #5) Content Objective : I will be able to describe the relationship between mass, force and acceleration. I will be able to create a scatter plot graph to display my data and use it to predict a future observation. I will be able to apply my understanding of Newton’s 2 nd Law to a real-world problem.
Quiz 4-1 (Checklist #6) Quiz will be on _________________ . Ideas to Study Definition of Newton’s 2 nd Law How force and mass affect acceleration. Calculating Net Force and using the equation for Newton’s 2nd Law
Friction and Air Resistance Graphic Organizer (Checklist #7) Complete the Graphic Organizer Use resources online or a textbook to complete the graphic organizer.
Section 4-2: Friction & Air Resistance (Checklist #7) Calculating Friction
Section 4-2: Friction & Air Resistance (Checklist #7) µ Pronounced “mu” Represents the Coefficient of Friction Represents how sticky/slippery two surfaces are. µ = 0 ; when there is no friction
Section 4-2: Friction & Air Resistance (Checklist #7) The direction of the friction vector is always opposite of the direction of motion or attempted motion.
Section 4-2: Friction & Air Resistance (Checklist #7) With your shoulder partner – Two forces act on a book resting on a table: its weight and the support force from the table. Does the force of friction act on it as well? Defend your answer.
Concept Development Page 5-1 (Checklist #8) Answer the question on the front and back of the hand out and discuss the solutions with your table partners.
Friction Problem Set (Checklist # 9) Example 1 Brian walking through the school cafeteria but does not realize that the person in front of him has just spilled his chocolate milk on the floor. When Brian steps on the wet floor, the coefficient of friction between his shoe and the floor drops to 0.040. Draw a free body diagram of the forces acting on Brian when he steps on the puddle of milk. If Brian has a mass of 45 kg, how much weight is acting on Brian? What is the normal force (force the floor pushes on Brian )? What is the force of friction between Brian and the slippery floor?
Friction Problem Set (Checklist # 9) Example 2 While redecorating her apartment, Kitty slowly pushes an 82 kg china cabinet 15 m across a wooden dining room floor. The cabinet moves at a constant speed of 8 m/s and the fictional force between the cabinet and the floor is 320 N. What is the coefficient of friction between the cabinet and the floor?
Friction Problem Set (Checklist # 9) Example 3: Robert slides a 3.2 kg book across the table to a friend. The book slides perfectly straight and stops in front of a student sitting 2.5 meters away. If the coefficient of friction between the table and book is 0.350, what was the acceleration book as it slid across the table?
Force Vector Diagrams (Checklist #10)
Friction Lab (Checklist #11) Content Objective : I will be able to state the variables that affect friction between two surfaces. I will be able to determine the coefficient of friction between two surfaces and use that information to predict a future outcome. I will be able to apply my understanding of friction to a real-world problem.
Quiz 4-2 (Checklist #12) Quiz will be on _________________ . Ideas to Study Types of Friction Calculating Friction Drawing Free Body Diagrams
Section 4-3: Applying Force – Pressure (Checklist #13) Read Section 5.5 from the textbook on pages 64 & 65. Create your own notes for this section. On page 71 – Write and Answer questions 10 and 11 on the note sheet.