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Mechanical Energy It was said that work is done upon an object whenever a force acts upon it to cause it to be displaced. Work involves a force acting upon an object to cause a displacement. In all instances in which work is done, there is an object that supplies the force in order to do the work. If a pitcher winds up and throws the baseball towards home plate, then the pitcher supplies the force to do the work on the baseball. If a roller coaster car is displaced from ground level to the top of the first drop of a roller coaster ride, then a chain driven by a motor supplies the force to do the work on the car to get it to the top. The energy acquired by the objects upon which work is done is known as mechanical energy. Mechanical energy is the energy that is possessed by an object due to its motion or due to its position. Mechanical energy can be either kinetic energy (energy of motion) or potential energy (stored energy of position).



Water Mill A watermill is a structure that uses a water mill or turbine to drive a mechanical process such as flour, lumber or textile production, or metal shaping. There are two basic types of watermill, one powered by a vertical waterwheel through a gearing mechanism, and the other equipped with a horizontal waterwheel without such a mechanism. The former type can be further divided, depending on where the water hits the wheel paddles, into undershot, overshot, breastshot and pitchback (backshot or reverse shot) waterwheel mills. The water pushes the mill and rotates the gears. This is what is used for processes of building things.  Experiment In this experiment it was found that different shapes of silly putty have different falling speeds from one meter to.the ground. The purpose was to see if the different shapes have different falling speeds. The method was to make four different shapes that have air resistance and then drop them from a meter off the ground. I made four shapes circle, I also flattened the silly putty, square, and a rectangle. I used a timer to time how fast the silly putty would fall to the ground. After take three measures of how fast the silly putty fell, I averaged them out and got my answers. For the first shape that was created, the circle. It hit the ground it 0.36sec. The second shape is where I flattened the silly putty and then dropped it. The silly putty hit the ground in 0.7sec. The third shape is a rectangle. It hit the ground in 0.56sec. The final shape is a square. The square fell in 0.54sec. This has shown that the less amount of space for air resistance to catch the faster things will go.