Hooke's Law: force exerted by a spring
Hooke's law: the magnitude of the force exerted by a spring is directly proportional to the distance the spring has moved from equilibrium.
Conservation of energy
The block slides on a horizontal frictionless surface. K is kinetic energy. U is elastic potential energy and E is total mechanical energy. While potential energy is converted to kinetic energy (and vice versa), total mechanical energy remains constant.
Other animations by Yves Pelletier
The title says it all: this blog features physics videos found everywhere on the web: animations, demonstrations, lectures, documentaries.