Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Physical Sci
Chapter 4: Work and Energy
| Question | Answer |
|---|---|
| in an ideal system, the sum of the kinetic and potential energies is constant; Ek + Ep = E (a constant) | law of conservation of mechanical energy |
| the capacity to do work | energy |
| the unit of work (and energy) in the British system | foot-pound (ft.lb) |
| the potential energy resulting from an object's position in a gravitational field. In other words, the stored energy that comes from doing work against gravity | gravitational potential energy |
| a unit of power equal to 550 ft-lb/s | horsepower |
| a unit of energy equivalent to 1 N-m or 1 kg-m2/s2; SI unit of energy | joule (J) |
| a unit of electrical energy (power x time); P=E/t, and E = Pt | kilowatt-hour (kWh) |
| energy of motion equal to 1/2mv2 | kinetic energy |
| the energy a body possesses because of its position in a force field; energy of position | potential energy |
| work or energy per unit time; time rate of doing work; J/s | power |
| a unit of power equivalent to 1 kg-m2/s3, or 1J/s; SI unit of power | watt (W) |
| the product of a force and the parallel distance through which it acts; process of transferring energy; (unit of work N.m) | work |
| energy sources than cannot be exhausted; i.e. solar power, wind power, hydropower | renewable energy sources |
| requires an isolated system | conservation of total energy |
| energy sources other than fossil fuels and nuclear reactions | alternative energy sources |
| in addition to force, what does work involve? | motion |
| when negative work is done on a moving object, its kinetic energy _____________ | decreases |
| gravitational potential energy depends on 1) 2) 3) | Mass; acceleration due to gravity; height |
| when the height of an object is changed, the gravitational potential energy _________________ | depends on the reference point |
| energy cannot be ______________ | created |
| If one motor has 3x as much horsepower as another, then the less powerful motor | can do the same work in 3x the time |
| in the US, which sector consumes the most energy? | industy |
| what would not be classified as a total alternative fuel source | gasohol |
| what renewable energy source currently produces the most energy | hydropower |
| work is equal to the force times the _________ distance through which the force acts | parallel |
| work is a _____________ quantity | scalar |
| mechanical energy consists of ___________ energy and_____________ energy | kinetic energy and potential energy |
| the stopping distance of an automobile on a level road depends on the ____________ of the speed | square |
| the total energy of an ___________ system remains constant | isolated |
| in the US __________ is th emost consumed fuel | oil |
Created by:
malrey3
Popular Physical Science sets