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Description
Flashcards by dominique22, updated more than 1 year ago
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Created by dominique22
almost 12 years ago
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| Question | Answer |
| What is the law of conservation of energy? | That energy cannot be created or destroyed, but can change from one form to another. |
| What type of energy does an moving object have? | Kinetic energy |
| What is stored mechanical energy called? | Potential energy |
| When an object is lifted, what is it given? | Gravitational potential energy |
| What is the second type of potential energy? | Elastic potential energy |
| What is chemical energy? | energy that is stored in food and other fuels |
| Name types of energy | Kinetic, elastic potential, gravitational potential, nuclear, electrical, sound, light, chemical |
| What is work? | A force causing an object to move a given distance, the force must be acting in the same direction as the displacement (s) |
| What is Kinetic energy associated with? | movement; any object with speed has kinetic energy |
| What two factors that can affect how much kinetic an object has? | mass and speed |
| What is the formula for WORK? | W=Fs (W-work (j); F-force(N); s-displacement (m) |
| What is the formula for Kinetic energy? | K= 1/2 mv(v is squared) KE=kinetic energy (J); m=mass (kg); v--speed (m/s) |
| What is gravitational potential energy associated with? | the position that an object has in a gravitational field |
| What three factors affect how much Potential energy an object has? | mass, height, and acceleration due to gravity |
| What are the main two that differ on earth? | mass and height |
| What is the formula for gravitational potential energy? | Ug= mgh (Ug=gravitational potential energy (J), m=mass (kg), g=acc. due to grav. (m/s2), h= vertical height (m) |
| Give the two formulas for power. | power= (change in energy)/time power= work/time |
| What is energy efficiency? | using less energy to do the same amount of work |
| What is the formula for E.E? | e= energy(out)/energy(in) x 100% |
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