Think about what happens during an exciting moment at the ballpark.
The pitcher throws the ball across the plate, and the batter hits it high up into the stands.
A fan in the stands catches the home-run ball. In this example, the pitcher sets the ball in motion, the batter changes the direction of the ball's motion, and the fan stops the ball's motion. To do so, each must use a force, or a push or a pull.
You use forces all day long to change the motion of objects in your world. You use force to pick up your backpack, to open or close your car door, and even move a pencil across your desktop. Anytime you change the motion of an object, you use a force.
Explore Changing Motion:
Materials: quarter, book, tennis ball, cup, feather
Procedure:
1.Choose an object from the materials list and change its motion in several ways, from
not moving to moving
moving to not moving
moving to moving faster
moving to moving in a different direction.
Describe the actions used to change the motion.
Experiment again with another object. First, decide what will you do; then predict how the motion of the object will change.
Think and predict:
In step 3, how were you able to predict the motion of the object?
Play on this simulation and answer questions
https://phet.colorado.edu/sims/html/forces-and-motion-basics/latest/forces-and-motion-basics_en.html
Explore the forces at work when pulling against a cart,and pushing a refrigerator, crate, or person. Create an applied force and see how it makes objects move. Change friction and see how it affects the motion of objects.
In this lesson you will learn about 1 dimensional motion by going over this lesson and its activities:
http://www.physicsclassroom.com/Class/1DKin/U1L1e.html
The second step is for you to familiarize with the Newton's laws:
http://www.physicsclassroom.com/Physics-Tutorial/Newton-s-Laws
Please complete all of the lesson one activities for you to be able to proceed to the next link to apply them.
Cut copy and paste the following url into your browser:
http://susanryan.weebly.com/uploads/2/2/3/1/22312194/2.__net-force-practice-ws.pdf
Please complete naming and graphing worksheet on this link:
http://www.physicsclassroom.com/shwave
The General Physics Classroom will be graded for completion of the worksheet.
The Honors Physics classes will be graded for accuracy.
Imagine yourself riding a bike straight ahead at a constant speed, explain the forces acting on it moving forward, slowing down and when you stop pedaling.
Investigation Inertia: Take two balls of different masses and therefore different inertia. Use what you know about force and inertia to design an experiment that shows which ball has more inertia.
You learned that mass is a measure of inertia and motion will not change unless acted upon by an unbalanced force.
Next: you will learn how Newton's second law relates to force, mass and acceleration and how force works in circular motion.
If you are not able to think and answer about the cyclist or able to investigate Inertia please come by during the learning block or see me after school for relearning this topic.
Those who are interested to learn more on this topic:
Evaluating hypothesis: In Death Valley, California, the rocks move mysteriously on the dry lake bed. Scientists have developed some hypothesis over the years for why those rocks move. Evaluate each hypothesis and decide which ones are reasonable and discuss your thinking and conclusions in a small group.On Classzone.com learn more about moving rocks.
Use Classzone.com for watching more videos and learning more about this topic.
Lessons, animations and activities retrieved from:
Simulation activity from:
worksheet retrieved from:
http://susanryan.weebly.com/uploads/2/2/3/1/22312194/2.__net-force-practice-ws.pdf
This webquest was created as part of our Master's in Secondary Education course work for ED-569 Teaching science and maths in secondary classes.
Please feel free to use any of the content on this webquest giving credit for my work.
Thank you,
Geetha Ravi