Can anyone help me with work and power?

  • 0 votes

I can never remember the formulas and don't understand how to use them

Posted Tue 22nd April, 2014 @ 11:12 by Jasmine

3 Answers

  • 1 vote

technically, you are calculating work (energy), not either case the formula to use is: 


example: a 5-watt radio is operated for 200 hours. How many kilowatt-hours of electric energy does it use?
(in this case, the power is 5 W, and the time is 200 h) 

5 W =.005 kW (basic unit conversion 1 W=.001 kW) 

operated for 200 hours: 

.005 kW*200 h= Work 

Work= 1 kWh

Hope this helps, let me know if it does 

Answered Tue 22nd April, 2014 @ 12:16 by aaqil
Edited by aaqil on Tue 22nd April, 2014 @ 18:14
  • 0 votes

What is the formula that u want help with 

Answered Tue 22nd April, 2014 @ 11:43 by aaqil
  • 0 votes

How to use the formula to determine the amount of power used

Answered Tue 22nd April, 2014 @ 12:01 by Jasmine