Work, Energy and Power Flashcards
Work
The product of the displacement and the component of the force parallel to the displacement
Gravitational potential energy
The energy and object possesses due to its position relative to a reference point
Kinetic energy
The energy an object possesses due to its motion
Mechanical energy
The sum of gravitational potential energy 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.
The 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
