Newton's Laws of Motion

There was this fellow in England named Sir Isaac Newton. A little bit stuffy, bad hair, but quite an intelligent guy. He worked on developing calculus and physics at the same time. During his work, he came up with the three basic ideas that are applied to the physics of most motion (NOTmodern physics). The ideas have been tested and verified so many times over the years, that scientists now call them Newton's Three Laws of Motion.

First Law

The first law says that an object at rest tends to stay at rest, and an object in motion tends to stay in motion unless acted upon by an unbalanced force. If nothing is happening to you, and nothing does happen, you will never go anywhere. If you're going in a specific direction, unless something happens to you, you will always go in that direction. Forever.

You can see good examples of this idea when you see video footage of astronauts. Have you ever noticed that their tools float? They can just place them in space and they stay in one place. There is no interfering force to cause this situation to change. The same is true when they throw objects for the camera. Those objects move in a straight line. If they threw something when doing a spacewalk, that object would continue moving in the same direction and with the same speed unless interfered with; for example, if a planet's gravity pulled on it (Note: This is a really really simple way of describing a big idea. You will learn all the real details - and math - when you start taking more advanced classes in physics.).

First Law http://teachertech.rice.edu/Participants/louviere/Newton/law1.html

Second Law

The second law says that the acceleration of an object produced by a net (total) applied force is directly related to the magnitude of the force, the same direction as the force, and inversely related to the mass of the object (inverse is a value that is one over another number... the inverse of 2 is 1/2). The second law shows that if you exert the same force on two objects of different mass, you will get different accelerations (changes in motion). The effect (acceleration) on the smaller mass will be greater (more noticeable). The effect of a 10 newton force on a baseball would be much greater than that same force acting on a truck. The difference in effect (acceleration) is entirely due to the difference in their masses.

Second law

http://teachertech.rice.edu/Participants/louviere/Newton/law2.html

Activity 1. Print out the table from the bottom and complete using the following website. http://www.physicsclassroom.com/Physics-Interactives/Newtons-Laws/Force/Force-Interactive

Third Law

The third law says that for every action (force) there is an equal and opposite reaction (force). Forces are found in pairs. Think about the time you sit in a chair. Your body exerts a force downward and that chair needs to exert an equal force upward or the chair will collapse. It's an issue of symmetry. Acting forces encounter other forces in the opposite direction. There's also the example of shooting a cannonball. When the cannonball is fired through the air (by the explosion), the cannon is pushed backward. The force pushing the ball out was equal to the force pushing the cannon back, but the effect on the cannon is less noticeable because it has a much larger mass. That example is similar to the kick when a gun fires a bullet forward.

third law http://teachertech.rice.edu/Participants/louviere/Newton/law3.html

Practice Activity Watch the hockey video about Newton’s laws. Write down examples of each law shown in the video.

http://www.nbclearn.com/nhl/cuecard/56615

Activity 1

Go to the website below. After the intro click on the button that saws “Law of inertia” (1st law). Follow the prompts and make your way through all three laws and the Newton Bio. Write the answer ONLY to the 10 questions quiz in your notebook as you take it.

http://science.discovery.com/interactives/literacy/newton/newton.html

Activity 2 Complete the handout and then check your answers http://teachertech.rice.edu/Participants/louviere/Newton/laws.html

Activity 3

Click on the website below once on the webpage click on take the test. Write you answers down in your notebook.

http://www.softschools.com/quizzes/science/newtons_laws/quiz384.html

Activity 4 Brain Pop: Newtons Laws https://www.brainpop.com/science/motionsforcesandtime/newtonslawsofmotion/

Activity 5

Click the website below and try to win all the events.

http://www.bbc.co.uk/schools/ks2bitesize/science/physical_processes/forces/play.shtml

Activity 6

Click the website below and try to get the highest scores possible!

http://pbskids.org/zoom/games/3puckchuck/3puckgame.html

Newton's 1st Law quiz http://www.ck12.org/assessment/ui/views/test.view.new.html?531e5d4ada2cfe50de0a8674?type=practice&nextPractice=false&referrer=practice_details&ep=http://www.ck12.org/book/CK-12-Physical-Science-Concepts-For-Middle-School/r103/section/4.21/

Day 3

Distance Speed Time Formula

Speed is a measure of how quickly an object moves from one place to another. It is equal to the distance traveled divided by the time. It is possible to find any of these three values using the other two. This picture is helpful:

The positions of the words in the triangle show where they need to go in the equations. To find the speed, distance is over time in the triangle, so speed is distance divided by time. To find distance, speed is beside time, so distance is speed multiplied by time.

Song about acceleration

http://www.ck12.org/physical-science/Velocity-Time-Graphs-in-Physical-Science/enrichment/The-Speed-is-Distance-Over-Time/?referrer=featured_content

Activity 1 Complete the practice activity in the add files section

Day 4

What is acceleration? Acceleration is the measurement of change in an object's velocity. When you press down on the gas pedal in a car, the car surges forward going faster and faster. This change in velocity is acceleration. The equation for calculating acceleration is: Acceleration = (change in velocity)/(change in time) or a = Δv ÷ Δt How to Measure Acceleration The standard unit of measurement for acceleration is meters per second squared or m/s2. You can calculate this from the above formula where velocity is meters per second and time is in seconds.

Activity 1 Lets graph this information:

Extra Files:

Distance Rate and Time practice.docx (12k)Kathy Dougherty, Feb 12, 2017, 7:37 PM

Newton laws lab.docx (12k)Kathy Dougherty, Feb 22, 2018, 10:33 AM

Newtons Law 2 activity 1.pdf (73k)Kathy Dougherty, Feb 25, 2018, 7:44 PM

Practice Newtons Laws.doc (26k)Kathy Dougherty, Feb 14, 2016, 9:06 AM

f=ma.docx (14k)Kathy Dougherty, Feb 13, 2017, 6:05 AM

read about the laws.docx (13k)