Hi everyone who reads my post now!!!
Our Tueday's Science Class we started our classfrom talking about our "Design a Supehero" project. Just to let everyone know, it is due this Friday, March, 2011. To see more about this project I recommend everyone to look at Chiara's post, because it has a lot of information about the "Superhero Project"; or you can also see http://zagreb.ceesa.net/course/view.php?id=188 , which is Moodle.
Today we basically read p. 108-113 in our "Science Explorer" book and made some math problems that are on page 112. After that, we took notes about work, power, joule. And here is what we were supposed to take notes on:
- Work-is when you exert a force on an object that causes the object to move some distance. You can also explain work as- a force exerted on an object that causes to move.
- The object moves in the same direction in which the force is exerted.
- Force in the same direction: to do work on an object, the force you exert must be in the same direction as the object's motion.
- NO WORK WITHOUT MOTION!
- Calculating work: is the amount of work done on an object. Can be determined by: work= force x distance
- Here is a website that can help you learn more about work: http://www.school-for-champions.com/science/work.htm
- Joule- the unit for joule is (J). Joule is the amount of work you do when you exert a force of 1 Newton to move an object a distance of 1 meter.
- Joule is a SI unit of work.
- The amount of work you do on an object is not affected by the time it takes to do the work.
- Here is the website about jouls: http://www.diracdelta.co.uk/science/source/j/o/joule/source.html
- Power- is the rate at which the work is done.
- Power equals the amount of work done on an abject in a unit of time.
- Power= work/ time (I can't find symbols here, so, power= work divided by time)
- Power units: 1KW = 1,000 W ( one Killowatt equals 1,000 Watts).
- One Watt is very small.
- Engines use horsepower, not Watts!!!
- One horsepower= 746 Watts
And this is it! I tried to make my post as short as possible and easy to read! I hope you liked it!
For homewrok we have to do the math sheet, which is due on Thursday.
THE NEXT SCRIBE IS... (COOL MUSIC) DAVIDE!!!
