Wheeeee.... Alright then... So this week we continued more force things and had a quiz on Thursday....


Mon. SO on Monday we went over our weekend H.W. and then we discussed what a force diagram was. We had two students who were trying to explain what a force diagram was. Student B was right, he/she said the force diagram showed an elevator speeding up or slowing down.


Tues. We went over last nights H.W and did the a force lab... that involved rolling a bowling ball around and seeing how it speed up. Yeah so you push the bowling ball at a constant rate and watch what happens. It should start accelerating and then go at a constant speed. The you and a friend had to push the bowling ball back and fourth and see what happens. The bowling ball will go one way, decelerate, and start going backwards when your friend pushes it. Yeah fill free to disagree or whatever...


Wed. We talked about how weight is a measurement of force. For example on the earth you might weigh 180lbs but on the moon you weigh 30 lbs. It's not that you lost weight, its that your force changed. The moon has less mass than the earth, so it has less force than the earth. To draw a force diagram of this you have to remember that you are standing on a scale. So for the earths diagram, draw a dot ( you) the draw an arrow going up ( F (Force) of scale on you.) Then draw an arrow of equal length going down ( F earth on you) They are equal because you aren't falling through the earth. =) For the moon draw arrows smaller, but thy still have to be equal. =)



Thurs: Quiz... T_T



Fri: Wheeee we did fun experiments where a friend and I got to pull people on a cart with string... =) Mwahahah XD We did this to disprove our hypothesis more mass= more acceleration. And when we did the experiment we had one person on a cart and we pulled the cart down the hall. Then for our next trial we added a person, the cart seemed to go slower than the first trial. (Note: My friend and I had to make sure that we were using the same amount of force and weren't pulling harder.) Then we added a third person and the cart wouldn't even budge... LOL XD So we came up with the hypothesis: Less mass = more acceleration. Greater mass= less acceleration with the same amount of force. The greater the force the more the acceleration.



Oops almost forgot! Why is this important to know?
It is important to know this so you don't wind up doing something stupid like trying to pull an elephant. This way you know you probally need more people to pull the elephant! XD *Rate ORANGE for elephant!!!*












Yup... XD