1. Warm-up Get your green textbook folder Open to the warm-up from yesterday and draw a line under it Create a label for the next sections of the paper “ Inclined Planes Notes” We will take a few notes then do a lab Come get a lab sheet from the front (1/3 of a piece of paper)

2. Objective 6.8E- Inclined Planes & Pulleys The student is expected to investigate how inclined planes and pulleys can be used to change the amount of force to move an object

3. Try this challenge… If you are so inclined.

4. Carefully look at each picture. Try to find something they all have in common. Wait to share ideas until we are done, but feel free to write down any notes or guesses as we go through them.

15. Was it plane to see?

16. Inclined Planes! A plane is a flat surface. The inclined plane is a slanted surface or ramp that helps us move objects up to another height. A screw and a wedge are made up of two inclined planes. The longer the distance of the ramp, or inclined plane, the easier it is to do the work, however, it will take a much longer time to do the work. The inclined plane works best when used to roll an object up to a greater height. When you roll an object that is extremely heavy up an inclined plane gravity is pulling the object down. An incline plane increases the size of the effort force making work much easier.

17. Now let’s take another look and discuss where the inclined planes are in each picture.

28. Explore: Inclined Planes Lab Question: What type of inclined planes requires the least amount of force to reach the top? Which type of inclined plane requires the most amount of force to reach the top? On your paper make a claim based off of what you already know. A claim states what you know and answers the question.

29. Inclined Planes Lab Procedure: Get into groups of 4 or 5 You will go to a station At each station you will have: – Spring Scale- Bag of Rocks - Plane (cardboard) – Three Dictionaries - Tub Take the bag and dump the rocks into the tub Make three equal piles of rocks Put one pile into the baggie Make an inclined plane with 1 dictionary and the plane (cardboard) Pull the baggie up with the spring scale, write down what you got in the correct box Pull the baggie up the plane with the spring scale and write the force in the correct box Now have three dictionaries under the plane and measure the force to pull the baggie up the inclined plane. Put this data on your sheet where it belongs Repeat these steps two more times but add another third of rocks each time till all the rocks are in the bag for the last trial

30. Inclined Planes Lab Amount of rocks Force to lift straight up (Newtons) Force to move up the inclined plane at Height 1 = ____ (Newtons) (1 Dictionary) Force to move up the inclined plane at Height 3 = ____ (Newtons) (3 Dictionaries) 1/3 of the bag 2/3 of the bag All rocks in bag

31. Inclined Planes Lab Procedure: Get into groups of 4 or 5 You will go to a station At each station you will have: – Spring Scale- Bag of Rocks – Three Dictionaries - Tub Take the bag and dump the rocks into the tub Make three equal piles of rocks Put one pile into the baggie Make an inclined plane with 1 dictionary and the plane (cardboard) Pull the baggie up with the spring scale, write down what you got in the correct box Pull the baggie up the plane with the spring scale and write the force in the correct box Now have three dictionaries under the plane and measure the force to pull the baggie up the inclined plane. Put this data on your sheet where it belongs Repeat these steps two more times but add another third of rocks each time till all the rocks are in the bag for the last trial

32. Now that you have finished on the same sheet you wrote your claim, write your evidence. Evidence is how you know your claim is correct. You should be using your data to help you with this Now write your reasoning. Reasoning is why does your evidence support your claim. Inclined Planes Lab

33. Claim, Evidence and Reasoning Claim- What do you know? Evidence- How do you know that? Reasoning- Why does your evidence support your claim

34. Conclusion What did you learn today? Which inclined plane used the least amount of force? Which inclined plane used the most amount of force?