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Energy and Work
| Question | Answer |
|---|---|
| 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
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