Woek, Enegery Power Flashcards
Work
The product of the displacement and the component of the force parallel to the displacement.
Gravitational potential energy:
The energy an object possesses due to its position relative to a reference point.
Kinetic energy
The energy an object has as a result of the object’s motion.
Mechanical energy:
The sum of gravitational potential and kinetic energy at a point.
The principle of conservation of mechanical energy:
In the absence of air resistance or any external forces, the mechanical energy of an
object is constant.
law of conservation of energy:
The total energy in a system cannot be created nor destroyed; only transformed from one form to another.
The Work-Energy Theorem:
The work done by a net force on an object is equal to the change in the kinetic energy of the object.
Power:
The rate at which work is done OR The rate at which energy is transferred.
One watt:
The power when one joule of work is done in one second.
Efficiency
The ratio of output power to input power.
