Work (physics)
Videos
In science, work is the energy transferred to or from an object via the application of force along a displacement. In its simplest form, for a constant force aligned with the direction of motion, the
A baseball pitcher does positive work on the ball by applying a force to it over the distance it moves while in his grip.
Lotus type 119B gravity racer at Lotus 60th celebration
Gravity racing championship in Campos Novos, Santa Catarina, Brazil, 8 September 2010
Kinetic energy
Videos
In physics, the kinetic energy of an object is the form of energy that it possesses due to its motion.
The cars of a roller coaster reach their maximum kinetic energy when at the bottom of the path. When they start rising, the kinetic energy begins to be converted to gravitational potential energy. The sum of kinetic and potential energy in the system remains constant, ignoring losses due to rolling resistance and drag.
Emilie Chatelet portrait by Latour