Access Prior Knowledge Lesson 3: What are Newton's laws of motion? Opening Activity ·Open Science textbook to page 418. ·Open Science folder to review vocabulary words and outline for the chapter. ·Open Workbook to page 131A. ·Open Science journal and answer the following questions: 1- What are two examples of forces? 2- How does friction affect movement? ·Review Content Cards and Q-Cards in bin, sharing with partners quizzing each other quietly. ·Log in to clickers using student ID number. ·Be ready to review home learning when timer goes off. ·Don't forget to write your home learning in your agenda page 132A.

1More than one force can act upon an object at a time. Yes No Do you agree with the statement?

2Balanced forces acting on an object will cause it to change its motion. Yes No Do you agree with the statement?

3Objects with little mass have more inertia than objects with a lot of mass. Yes No Do you agree with the statement?

4Force is equal to an object’s mass multiplied by its acceleration. Yes No Do you agree with the statement?

Net Forces ·The net force is the total of all forces acting on an object, which determines whether it will start moving, stop moving or change direction. ·Equilibrium is a state in which all the forces on an object balance each other, an object moves when unbalanced forces act on it. Net Forces First paragraph pg. 419

Newton's First Law ·An object in motion will keep moving unless a net force acts on it and an object at rest (not moving) will stay at rest until a net force acts on it. ·Inertia keeps things from changing their motion. First paragraph pg. 420 Newton's First Law

Newton's Second Law ·The net force equals the mass of the object times its acceleration. Force = Mass ´ Acceleration Acceleration = Force ¸ Mass Mass = Force ¸ Acceleration ·Acceleration is the rate at which the velocity of an object changes over time. Force (N)Mass (kg) Acceleration (m/s 2 ) Newton's Second Law First paragraph pg. 422

Newton's Third Law ·When one object exerts a force on a second object, the second object exerts a force on the first object; action-reaction law of motion. Newton's Third Law First paragraph pg. 424 Newton's Laws of Motion

Newton's First Law Newton's Second Law Newton's Third Law MatchQuest

TextQuest Answer in your Science Journal 1. What is a inertia and give an example? 2. The more net force an object has acting on it, the (less or greater) the acceleration? 3. If Juan and Jose are pushing a box across the floor, Juan with 10N and Jose with 5N, what is the net force? 4. If Maria and Nathalie are playing tug-of-war, Maria is pulling with 8N and Nathalie is pulling with 6N, what is the net force on the rope and who will win? ·Don't forget to write your home learning in your agenda page 132A.