Term105

Kinetic Energy

Aligning the Spine

“Stand up straight!? “Pull your shoulders back!? As children, we were told to have good posture. Yet we were seldom taught effective ways to accomplish this. Indeed, we were often not even told just what “good posture? is.
The consequences of this information gap can be seen all around us: stiff necks, shoulders hunched forward or pulled tightly back, restricted breathing, and tightness in the thighs, legs and ankles. Backaches, headaches, and other painful symptoms are often the unfortunate result.
Causes of poor posture
The causes of poor posture can be divided into two categories: positional and structural. Structural causes are basically permanent anatomical deformities not amenable to correction by conservative treatments. Positional causes of poor posture include

Understanding Energy & Power

Kinetic energy is energy of motion. A rubber band flying through the air has kinetic energy. When you are walking or running your body is exhibiting kinetic energy. Potential energy is converted into kinetic energy. Before the yo-yo begins its fall it has stored energy due to its position. At the top it has its maximum potential energy. As it starts to fall the potential energy begins to be changed into kinetic energy. At the bottom its potential energy has been converted into kinetic energy so that it now has its maximum kinetic energy. A waterfall has both potential and kinetic energy. The water at the top of Bridal Veil Falls has stored potential energy. When the water begins to fall, its potential energy is changed into kinetic energy. This change in energy also happens at Niagara Falls where it is used to provide electricity from the transformation of mechanical and electromagnetic energy to parts of the northeastern United States.