In this video Paul Andersen explains how the energy in a closed system can be converted from kinetic to potential to kinetic energy. Sample problems and a simulation is contained.

Kinetic vs. Potential energy

Neal Unger is a 60-year-old skateboarder who inspires kids to keep reaching for their dreams and taking risks! Through skateboarding and work he does with the Next Up Foundation, which is a nonprofit for kids, he is truly an inspiration....

Howcast - Learn about skateboarding gear and get setup tips from competitive skateboarder Nate Cohen in this Howcast skateboarding video.

Today Henry meets a skateboard where there is an extreme sports competition on. Skateboard is eager to take part but his skater slipped and grazed his knee. Henry becomes a skateboarder and makes his way to the finish line just in time...

Easy Languages is an international video project aiming at supporting people worldwide to learn languages through authentic street interviews and expose the street culture of participating partner countries abroad. Episodes are produced...