Ballistic Simulation

Ballistic Simulation

Gears by Chance

Gears are simple machines.  Some kinds of gears are: 40 tooth gears, 24 tooth gears, rack gears, worm gears, and cam gears to name a few.  There is also the driver gear and the followers gear.  You can find a gear in clocks and in  lego mechanisms.  A gear is a rotating machine part with cut teeth.  They may be on wheels or cylinders.  Gears have parts with teeth to change speed or direction.

Simple Machines by Treyson and Erik

    Simple machines make life, jobs, and other peoples' lives easier.  Gears are a simple machine. There are two important gears. The big one is called the driver gear,  the small one is called the follower gear.  Simple machines are everywhere. Simple machines make life easier. We wouldn't live without them! They are really cool!
Simple machines  =  EASY!  

Gears by Edward and Josh

Simple machines are a big help in life.  We can't do a lot without simple machines.  They make work faster and easier.  A scientist came and showed us how gears work.  Here are some examples of simple machines: a pulley, wedges, screw, inclined planes, wheel and axle.  There are a lot of simple machines.
      Gears are a circles with bumps on the edges.  The picture shows an example of  a gear a car has gear to move the wheels.  There can be several gears working together.  The bumps on the gears are called teeth.  The teeth are what turns gears. 
      We built sweepers with Lego's.  There are little gears, big gears,
and medium gears.
      Gears are in many different sizes and shapes and that's how gears work.
     

Pulleys By: Sydney and Constance

A pulley is a wheel with a groove. A rope fits in the groove.  A single fixed pulley is attached to the load instead of any other object.  This type of pulley changes the direction the load moves.  The groove helps heep the rope or chain in place.  As you pull the rope, the wheel turns. Moveable pulleys making lifting things easier. Moveable pulleys are often used with fixed pulleys. A flagpole has a single fixed pulley. Pulling down on the rope raises the flag. Moving the rope in the opposite direction  lowers the flag. As you pull the rope, the wheel turns. Using a pulley you can pull very heavy objects and it seems easier.
A single fixed pulley is attached  to an object. This type of pulley changes the direction a load moves. Moveable pulleys are attached to the load  instead of an other object.

Pulleys By Heidi and Constance

A pulley is a wheel with a groove. A
 rope fits in the groove. For an example, a flag is pulley. The groove helps keep the rope or chain stay in place. As you pull the rope, the wheel turns. Using
a pulley you can pull very heavy objects and it seems easier.
A single fixed pulley is attached to an object. This type of pulley
changes direction a load moves. Movable pulleys are attached
to the load instead of another object. Movable pulleys make
lifting things easier. Movable pulleys are often used with fixed pulleys.
Cranes use fixed pulleys  and movable pulleys to lift heavy loads.   

Pulleys by: Tate

     A pulley is a simple machine. Pulleys make lifting easier. If you have one pulley on one rope, you are pulling that same exact weight. If you have two pulleys on one rope. with a hundred lbs. you are only pulling 50 lbs., but you have to pull twice as far.   We learned about pulleys in school. We got to pull down with a pulley and watch the load move up.    N.D.S.U. came over to our school and we got to build cars with Lego's.  we got to pull a pulley with one ropes that one was way heavier then the one with six ropes.  The one with six ropes was easier to pull but you had to pull it further.
    Aren't pulleys fun to learn about?