Newton’s 3 Laws of Motion Abigail Krueger EDCI 270 Project III Main MenuNext

Target Audience 10 th – 11 th grade high school students Approximately ages 15 – 17 Previous experience required in basic math, Algebra I Main MenuNext

Learning Environment Preferred: classroom with computers, students can ask teacher to clarify lesson if needed Secondary: home computer with PowerPoint capability NextMain MenuLast

Objective 1 After learning Newton’s 1 st Law of Motion, students will answer quiz question 1 with 100% accuracy. Main MenuNextLast

Objective 2 After learning Newton’s 2 nd Law of Motion, students will answer quiz question 2 with 100% accuracy. Main MenuNextLast

Objective 3 After learning Newton’s 3 rd Law of Motion, students will correctly identify one action- reaction pair in quiz question 3. LastNextMain Menu

Newton’s 3 Laws of Motion The First Law The Second Law The Third Law Take the Quiz! Start Here! References

Why Learn About Motion? Motion is a part of everything we do. Today, we’re going to learn about three basic laws, which were discovered by this guy: Main MenuNext Plus... It’s fun!

Newton’s First Law of Motion Welcome to Newton’s 1 st Law of Motion! It’s time to learn about INERTIA. Later we will study his 2 nd and 3 rd laws. Main MenuNextSkip to Quiz

Law of Inertia The law of inertia states that “an object in motion will stay in motion, and an object at rest will stay at rest, unless acted upon by an outside force”. Main MenuNextSkip to QuizLast

What does this mean? When you start rolling a ball, it continues to roll. Hence why you sometimes have to chase it across the street. Things that are stopped stay stopped. The ball doesn’t move until you push or kick it. Main MenuNextSkip to QuizLast

Inertia Example Question: If a car is speeding down the street and has no driver, does it stop at red lights? Answer: NO. An object in motion will stay in motion. The car will continue to move unless someone hits the brakes. Main MenuNextSkip to QuizLast

Law of Inertia Now that we’ve learned about Newton’s First Law of Motion, it’s time to consider those “outside forces” that can change an object’s motion. Main Menu The 2 nd Law Skip to QuizLast

Newton’s Second Law of Motion You should already know about inertia. Now it is time to learn a little bit about forces before moving on to Newton’s 3 rd Law. Main MenuNextSkip to Quiz

Forces Newton’s 2 nd Law is about the strength of forces. This law is pretty intuitive. You already know that a large, heavy object is harder to lift than a smaller one. Now it is time to find out why this is true. Main MenuNextSkip to QuizLast

Forces Newton had an equation to find the numerical value of a force. Main MenuNextSkip to Quiz F = m x a force mass of the object acceleration, or rate of change in motion Last

Force Units Forces: newtons (N) Mass: kilograms (kg) Acceleration: meters per second squared (m/s 2 ) gravity = 9.8 m/s 2 Main MenuNextSkip to QuizLast

Force Example To solve for a force, you will be given a mass an acceleration to multiply together. Question: What force does a 65 kg person exert on the ground after falling off of a cliff, accelerating at 9.8 m/s 2 ? Answer: Force = 637 N Main MenuNextSkip to QuizLast

Forces Now you know that to change an object’s motion you need to accelerate its mass with a certain force. Let’s learn about how forces interact with each other next. Main Menu The 3 rd Law Skip to QuizLast

Action-Reaction Pairs Now that we’ve learned about how forces change an object’s motion in Newton’s first and second laws, let’s move on to how forces interact with each other. Main MenuNextSkip to Quiz

Action-Reaction Pairs Newton’s 3 rd Law states that “for every action, there is an equal an opposite reaction”. Main MenuNextSkip to QuizLast

Action-Reaction Pairs Think about it. When you lift something up with a certain force, don’t you feel that object pushing back down on you? Main MenuNextSkip to QuizLast

Examples of Action-Reaction PAIR: gravity and the normal force. PAIR: you punch the wall, and the wall hurts your hand. NOT a pair: your friend hits you and you hit him back. Main Menu Take the Quiz! Last

Now that you’ve learned a bit about Newton’s 3 Laws of Motion, it’s time to test your knowledge. Start the Quiz!

Question 1 Which of these choices is an example of inertia? A) you catch a flying ball B) a car brakes to stop at a red light C) a person falls through the air D) after the skater gets off, a skateboard continues to roll D) after the skater gets off, a skateboard continues to roll Main Menu

Great job! The correct answer was (D). You definitely know Newton’s 1 st Law! Main MenuNext Question

Oops! That’s not quite right. Remember: “objects in motion stay in motion”. Hint: gravity exerts a force! Main MenuTry Again

Question 2 Imagine your car runs out of gas. If it weighs 1500 kg, and you push it with a =.05 m/s2, what force are you pushing with? A) 0 N B) 75 N C) 100 N D) 50 N Main Menu

Good Job! The force you push with is 75 N. Although whether you can actually push a car is another question entirely. ;) Main MenuNext Question

Oops! That’s not quite right. Remember: F = ma. Check your math to make sure you did it right! Main MenuTry Again

Question 3 Which of these choices is an action-reaction pair? A) gravity and the normal force B) you punch your brother and he punches you back B) you punch your brother and he punches you back C) you kick a ball and it moves forward Main Menu

Awesome! The normal force is the force that opposes gravity. You know your force pairs! Main MenuFinish

Oops! That’s not quite right. These can be tricky! Hint: the two forces must go in OPPOSITE directions. Main MenuTry Again

Congratulations! You’ve finished the quiz! You are now an expert on Newton’s Laws of Motion. Main Menu

Sources: Newton’s Laws: Images: Main Menu