Work, Energy and Power! Work, Energy and Power! The Calculations and Equations.
Work And Energy
Transcript of Work And Energy
Colegio San PatricioPhysics
WORK AND ENERGYMrs. Nora Guerra
Mrs. Martha Fuentes
Work• Work is done whenever a force (F) is
exerted and whenever there is a displacement (s).
• The amount of work done is proportional to both, the force and displacement.
• (W=F*s)• Work is measured in newton-meters or
Joules.
Formula for work
W
F d
W= workF= forced= distance
Energy
• Ability to do work• No energy: no work• Measured in Joules.
Energy Examples• Energy:• In a raindrop: .0001 Joules• Needed to press a key: .01 Joules
Kinetic enegy• It´s the energy of motion.• An object with motion- whether it´s
vertical or horizontal- has kinetic energy.
Kinetic energy formula• Kinetic energy equals the massof
the moving object times the square of that object´s velocity, multiplied times the constant ½.
• KE= 1/2 mv²
Potential energy
• It´s the energy that can result in the exertion of a force over a distance. It is stored energy.
• Most common= Gravitational PE
Potential energy formula
• Potential energy (joules) = mass (kg)*g(m/s2)*height
(m).