In this video, a leaf blower is used in a hilariously creative way—to spin around on a chair like a homemade roller coaster. The experiment shows how the air pressure from the blower can propel a ...

June 5 (UPI) --A California man who built a roller coaster in his family's back yard is giving the ride away for free to anyone who can convince him they are the right person to be its new owner.

Roller coasters rely on two types of energy to operate: gravitational potential energy and kinetic energy. Gravitational potential energy is the energy an object has stored because of its mass and its ...