Energy Flashcards
What is energy?
The ability to do work.
What is mechanical energy?
The sum of a body’s potential energy.
What is gravitational potential energy?
The energy possessed by a body due to its position.
(gravitational)PE = ?
(gravitational)PE = mgh(mass * magnitude of an object due to its gravity * height of the object from the ground.
What is elastic potential energy?
The energy possessed by a spring or a rubber band when it is stretched or compressed.
(elastic)PE = ?
(elastic)PE = 1/2kx^2 (one half force constant times the elongation squared)
What is kinetic energy?
The energy possessed by a body because of its motion.
KE = ?
KE = ? 1/2mv^2 (one half mass times velocity squared)
What is work-energy theorem?
The work done on an object equals the change in kinetic energy of the object.
W = ?
W = KE - KEo