Van De Graff experiment

A Van de Graaff generator is a device for making lots of static electricity. Static electricity is made from extra charges stored some place so that they can’t move. Normally charges don’t like to collect in one place. The like to find opposite charges as partners and run away from particles with the same charge.        The generator makes static electricity the same way you do when you rub your feet on the carpet and then touch a doorknob. Inside the generator is a giant rubber band that rubs across a piece of felt, stealing its electrons. The rubber band then spins around and the electrons travel up to the big metal ball on top. If you have a hand on the metal ball, the electrons will go into you.
         If you touch the generator, all that electricity will go through your body giving you a big shock. It can actually be dangerous. You can be protected from the ground by standing on a piece of rubber or plastic. We say plastic and rubber are insulators since charges can’t travel through them very easily. When you touch the generator now, the charges can’t get to the ground. You are now filled up with electrons. The electrons don’t like each other and are trying to get as far away from each other as possibly. Usually this makes your hair stand up because it is filled with electrons that are repelling each other.

Last Progress Check

Here is our finished chair

Here is a crowd drawing of how the forces apply on our chair.



Progress check 2

After reviewing out last attempt to make a chair from the last material, we decided to make it another way.

We cut the folds off of the cardboard boxes.

Then we kept the sides of the slabs we cut and glue them together the reinforced them with tape.

Then we cut slides in the middle to stabilize the bottom part of the chair.

Then we cut the left over cardboard sides into smaller pieces and stuck them in the sides to hold its frame.

Then we glued cardboard to the top of the box and placed t right side up to let it dry.

Hooke's Lab

OSCILLATIONS

Materials:
metal rod
clamp
spring
rubberband
weights
timer
videor
calculations

Procedure:

the first thing we measured was the length of the spring without any weight on it. then we added weight and slightly pulled the spring to a certain distance and counted how many oscillations were in a certain amount of time. we choose to time all the oscillations for ten seconds and count the number there were in that time period. once we did multiple weights we calculated the displacement vs force and the period vs force.

Results:
the more weight that you put on the spring, the slower the oscillations became.












video

Friction Lab

In this lab we were trying to find the coefficient of friction. We had a block of wood and we lifted it up until it slide down, then we use a protractor and measured the angle of the piece of wood. After finding the vectors we found of resolved them into components and and used sin, cos, and tan to find the rest of the measurements.

Progress Check one

 

After I gathered many pieces of cardboard from various places, I selected a small box piece from the collection.

After out lining the sides of the cardboard I cut them out.

After cutting the edges off of the box, I made small cuts on one side so that I could put the slabs of cardboard in the sides so I could connect both sides to make a seat.

Then I cut the remaining cardboard in to strips so I could stick them into the cut slabs of cardboard.

Now after cutting up the strips I stick them in between the cuts like so.

Inertia trick

Video
  
Inertia is the property of matter by which it retains its state of rest or its velocity along a straight line so long as it is not acted upon by an external force.

In our trick we stacked several nickels on top of each other and we were told to use a knife or a thin, flat object to see if we could move the bottom nickel without moving the others. The first couple of tries we failed to do so, but after many tries we finally accomplished our goal of doing it correctly. This inertia trick shocked us, even though it was simple on the outside it was a very intense task to complete.