Power Flashcards
1
Q
What is power measured in?
A
Watts
2
Q
What is power?
A
The energy transferred per second or the work done per second
3
Q
An energy transfer of how many joules per second is equal to a watt?
A
1 joule per second is equal to 1 watt
4
Q
How do we calculate power?
A
Power=Energy transferred/time or work done/time
5
Q
If a motor does 3000J of work in 2 minutes, what is its power?
A
K- power=? Work done=3000J Time=120 seconds
E-Power=energy transferred/time
W-Power=3000/120
U-Power=25W
6
Q
How do we calculate time?
A
Time=Work done/power
7
Q
How do we calculate work done?
A
Work done=Power x time
