MECHANICAL ADVANTAGE- October 26th 2009

Mechanical Advantage a.k.a. (MA).

For an inclined plane : you find the length of the slope and divide it by the height of the slope.


So lets say the force you exert is 600
and the distance covered by an object you are pulling is: 1000(km)

MA= 6 over 10


To be honest, I need to have a further understanding of this topic, and the internet and my notes aren't great resources at the moment. So for further questions refer to Mr.Foster.

REMEMBER TO:
Complete all homework and come prepared to class.

Levers, and The Inclined Plane

First Class Lever:

No at first you think... how does this work? Look again can you figure out where the fulcrum is? Look at the leg that is touching the ice...we'll call this leg (F) the other foot which isn't on the ice will be called (R) for random. (F) is supporting the rest of the load (her body, from the end of her back to foot (R))... but where's the effort? Well before she started (which I couldn't get a photo of) she actually flung her arms from in front of her to beside her creating a pull that would make her spin. If you have any questions about this lever just ask me.

This is a second class lever. Ask yourself... where is the fulcrum? the Fulcrum is usually supports the rest of the lever. Now pretend that you are transporting some wood to your grandma's house where would you put the wood? In the basket, but is the wood going to exert and force and magically move itself to your grandma's house? no. So you need you effort. Its easier to lift than drag in some cases like this example so get your hands ready to lift. This is a second class lever because the fulcrum is in the far left the load is in the middle and the effort (YOU!) is on the side opposite the fulcrum.

Here is Julie, eating her delicious apple. Julie doesn't know that her mouth is actually a lever. It's in fact a third class lever. A third class lever occurs when the load is on the opposite side of the fulcrum and the effort is in between the two. The joints in Julie's mouth connect the upper and lower jaw together. Her teeth which are moving towards each other are touching her beautiful apple which is the load. The load in this photo is to the left of Julie's teeth meaning that the fulcrum is to the right of her teeth.

THE INCLINED PLANE:

This is simply a ramp but does it really make life easier? Well many people will agree that they would rather roll or slide an object than lift it. The resistance is gravity the force is YOU! and the object..well you can choose. How can you make it even easier to do this, while exerting less force? Make a longer ramp. Although you increase the distance you decrease the effort.... which for those people who don't like working well this is probably good for you.

Note Taking and Texbook Work-Class of October 9th

Hello!
Ok so on Day 4 of this week we went over information about notes and note taking.

Facts About Learning:

-You lose 47% of what you learned in 20 minutes.
-You lose 62% of what you learned after the first day.

Facts About Note Taking:

-It will be WAY easier to retain information if you:
-Turn off your cell phone, iPod, Radio, Computer, or anything that could potentially distract you during your studying or note taking.
-You need your absolute concetration, so move any objects thtat could potentially distract you, or that you might get bored of your work and use, toys...etc.

For those of you who weren't in class we read from pages: 414-434 (Science Textbook)

We are sadly no longer working on the levers project and will be working out of the textbook due to unsafe behaviour in the classroom.

Hello Everyone in class FI8D!
I am your new correspondent and although I haven't been to my class on Day 4 (that I will be rountinely reporting about) I must remind you that IF YOU DON'T SIGN UP FOR A JOB, it will be taken very soon. October 16th is when you can have two jobs! YOU NEED TO PAY YOUR RENT! So get moving...NOW.
Thanks, and be prepared for next class!
Evelyn

We have a new writer!

As part of her job description for the economic system running in our class, Evelyn will be writing the blog this year. Look for her exciting posts in the coming weeks.

As Evelyn begins Katie, Eric and Haley move on to bigger and better things. We wish them luck in their future endeavours.

Hope you enjoy the new writer!

Mr. F