Build a Compund Machine

Our Machine with an IMA of 28

In our compound machine, we combined all of our simple machines and made a compound machine, because we wantedto get the heighest IMA we could, this is how the IMA grading was determined

Grading is as follows:

If IMA is.....

A+ = 90

A =70-89

A - = 40-69

B+ = 28-39

B=20-27

C = 14-20

D = 8-13

F= 0-7

 

We got an IMA of excactly 28, so we were proud with a B+. Jack and Chris got an IMA of 247, so pretty much 200 more IMA than us. The other students used a pulley though, we did not have a pulley because it was destroyed in the process of making this compoud machine. We used a lever and a wheel and axle. We had to make a bigger wheel to get a greater IMA. Everyone used box of nails to get their IMA, and we used two which were 4.76N each. We should have made a pulley to start with so we could do better.

 

I think I learned that I should listen to Mr. Atkins and make a pulley next time. The thing that suprised me was that our IMA got us a B+ on the project. Next project we have to do everything much better so that our IMA and project could be a lot better.

 

 

 

Simple Machines

Simple Machines

 

In this project we built four simple machines in groups of 2-4. Those machines were, the wheel & axle, the inclined plane, the lever, and the pulley. Our main goal was to make these machines hold up a box of nails, and who ever could get the highest amout of IMA and percent efficiency. The highest IMA was 6, and whoever got closest to the IMA of 6 and got the highest percent efficiency would win. For the pulley the IMA was 2 and if you got to 2 then the you would win. The prize was a cupcake!



The Inclined Plane (Jason Solomon)



The Wheel & Axle (Joe Scotto)



 

 

 

The Pulley (Joe Scotto)

 

 

The Lever (Jason Solomon)

 

 

 

 

 

 



 

 

 

 

 

 



 

We came in last place, unfortunately. None of our projects got a high enough mechanical advantage. We struggled making our pulley. Troy who was absent the whole time, had known everything. We should have listened and paid close attention to how to make these. The final winner was Noah’s group. Noah’s group had the highest and best machines in mechanical advantage and efficiency.

We lost efficiency because of our measurements were off and which this really messed up our entire project. We didn’t even make the lever, so that screwed us over. Our incline was the only project that didn’t come in last place; it came in second to last, by one percent efficiency. If we knew how to create the project correctly, then we could of won the prize.