#Goals: SWBAT...
1. define inertia
2. explain how object's move when forces are unbalanced and balanced
3. Answer inertia related questions
Warm-Up (5min)
Copy and fill in the correct answers for the following:
- 1. Blood rushes from your ______ to your ____ while quickly stopping when riding on a descending elevator.
- 2. To dislodge ketchup from the bottom of a ketchup bottle, it is often turned ______ down and thrusted downward at high speeds and then abruptly ______.
- 3. Headrests are placed in cars to prevent whiplash injuries during _________ collisions.
- 4. While riding a skateboard (or wagon or bicycle), you fly _______ off the board when hitting a curb or rock or other object that abruptly halts the motion of the skateboard.
CLASSWORK
1. #022A: Water Demo of Inertia
- What is in the plates? Do the plates have tall sides?
- We'll have a race, from the sink, to the fire extinguisher, to the projector screen, and back to the sink. If you spill twice, you lose. If you aren't first, you lose.
- GO WIN.
- Q1: Why is it hard to keep the water in the plate?
- Q2: What physics concept does this illustrate?
2. #022B: Defining Newton's First Law
- Complete the following, and think about the water in the plate:
- An object at rest stays at ____ and an object in motion stays in _____ with the same speed and in the same direction unless acted upon by an _________ force.
- Copy the image from the board. It's a visual showing the same concepts, and we will fill it in together after I do a demo.
3. #022C: Practice Questions
LINK Answer 1, 3, 4, 5, 6 (complete outside of class if necessary - I'm here at lunch/nutrition for help)
At Home Learning (HW)
1. read the following: http://www.physicsclassroom.com/class/newtlaws/Lesson-1/Inertia-and-Mass While you're reading, think about how mass and balanced/unbalanced forces affect an object's motion, and answer the following:
a. Who was the first well known scientist to develop the concept of inertia?
b. Looking at the images of inclined planes, how do skateboarders and snowboarders use the concept of inertia to their advantage?
c. The Olympics are coming, and there's an event which uses these curved "inertial planes" to allow riders to do spectacular aerial tricks. What's the event?
2. #022D:
Inertia & Newton's 1st Law
Take Notes: LINK 1
Watch the video, and answer the EdPuzzle Questions: LINK 2