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# Energy and Work

When does work occur? when a force causes an object to move in the direction of the force
What formula is used to calculate work? W = F(D)
What is joule? the metric unit used to express work and energy
What are the 3 criteria for work? 1)force 2)motion of object 3) motion is in direction of the force
What is the English unit for work? ft-lb foot-pound
What is work? energy transferred through both force and motion
The ability to do work is called? energy
What law states that energy can not be created or destroyed. law of conservation energy
What are the 2 major forms of energy? potential and kinetic
Stored energy that has the potential to do work is called? potential energy
What is kinetic energy? energy of motion
What is the formula to find potential energy? Ep = wt x h
What is the formula for kinetic energy? Ek = 1/2mv²
When one object does work on another object, work is ___________________. transferred
All energy involves either ______________ or ________________. motion, position
A change from one form of energy to another is called? energy conversion
What energy conversions occur when using a curling iron? electrical to thermal
A swinging pendulum has energy conversion between _________________ and __________________. kinetic and potential energy
What opposing force causes kinetic energy to transfer into thermal energy? friction
When most of the potential is converted to kinetic energy, where does the rest of the energy go? thermal and sound
Created by: lcollette