If you missed today 2013-2014 we concentrated on Center of Mass

Einstein Board:
1.  We watched Rocky balance objects off youtube
2.  Students choose one of six cut outs to take home after cutting out and coloring
3.  We balanced a meter stick on our finger at the center of mass three different ways - just at 50 cm - setting meter stick on stretched out fingers and bringing fingers together - same thing only keeping one finger steady and just moving the other finger toward it
4.  We calculated the center of mass of a mobile and collected it pds 2, 3, and 8 and choose two students to weigh and a board to set them on a teeter totter after calculating where the center of mass was so we could set the board on two chairs back to back and duck taped together to have the students teeter totter on.  Collected both problems for 10 points pds 2, 3, and 8.
5.  We balanced as many nails as we could on one nail head.
6.  We also had students balance a spoon/fork combo on a glass using a toothpick or match stick then lit both ends

Rocky off you-tube  the professional at balancing objects from their center of mass.  We watch this version of Rocky off Outrageous Acts of Science

Center of Mass notes from the smart board pd 1    pd 2     pd 3     pd 8 

Can you balance a spoon attached to a fork on a glass using a toothpick?

Opps... Another horseshoe and straws center of mass/stability demo here but done yesterday.

How many nails can you balance on one nail head?  DEMO of stability

Below is for 2012-2013 school year

If you missed today we finished up the three conservation of momentum types of collisions labs that we started yesterday.
The first lab we did was the Inelastic collision where we pushed cart 1 south and let go before it entered gate 1 one where cart 2 was sitting between the gates.  The velcrose on each cart end allowed them to stick together after the collision and go off together through gate 2.
In the second lab we turned cart 2 around so we could cock a spring that was sprung when both carts we at rest next to each other between the gates.  This was the explosion lab.  The momentums of each cart should have been equal after the explosion but because one was the opposite direction, it would be considered negative so when added you should get zero.  To obtain the error we used the average of both positive momentums after the collision as the actual.
period 1        period 5        period 7      period 8
The above may be our data after day 1 and not today but that is all I have on my flash drive now and will have to wait till I get to school.  The same for you as if you go to the Q drive when you get to school, you can download your periods data for all three labs and finish up all the formulas for the labs, fill in the purpose, procedure, data table, error, and conclusions for each lab.