Sign In
Ask Question
Physics
Cullen Buck
4 April, 13:12
What is power in physics
+3
Answers (
1
)
Annabel Berg
4 April, 13:20
0
Edit
In physics, power is the rate of doing work or of transferring heat, i. e. the amount of energy transferred or converted per unit time. Having no direction, it is a scalarquantity. In the International System of Units, the unit of power is the joule per second (J/s), known as the watt in honour of James Watt, the eighteenth-century developer of the condenser steam engine. Another common and traditional measure is horsepower (comparing to the power of a horse). Being the rate of work, the equation for power can be written:
Power
Common symbols
Derivations from
other quantities
P = E/t
P = F·v
P = V·I
P = T·ω
As a physical concept, power requires both a change in the physical system and a specified time in which the change occurs. This is distinct from the concept of work, which is only measured in terms of a net change in the state of the physical system. The same amount of work is done when carrying a load up a flight of stairs whether the person carrying it walks or runs, but more power is needed for running because the work is done in a shorter amount of time.
Comment
Complaint
Link
Know the Answer?
Answer
Not Sure About the Answer?
Get an answer to your question ✅
“What is power in physics ...”
in 📙 Physics if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers
You Might be Interested in
Which is an example of potential energy? a a car driving on the road b a swimmer kicking their legs c a yo-yo in someone's hand d an arrow flying at a target
Answers (1)
Fish are not an excellent source of protein needed for good health. True False
Answers (2)
A cube of mass m1 = 7.7 kg is sitting on top of another cube of the same size and mass m2 = 1.4 kg while they are both in free-fall.
Answers (1)
Which is a characteristic of a step-up transformer? a:There are fewer loops in the secondary coil than in the primary coil. b:It converts direct current into alternating current.
Answers (1)
A car turns into a driveway that slopes upward at a 9.0 ∘ angle. The car is moving at 7.5 m/s. If the driver lets the car coast, how far along the slope will the car roll before being instantaneously at rest and then starting to roll back?
Answers (1)
New Questions in Physics
What caused the solar system to form a disk?
Answers (2)
Under what circumstances can air resistance exercises ignored?
Answers (1)
How does friction affect all moving objects?
Answers (2)
A force of 5N compresses a spring by 4cm. Find the force constant of the spring.
Answers (1)
Which of the following equations are balanced correctly? A: Cu + H2O → CuO + H2 B: Zn + HCl → ZnCl2 + H2 C: 2C4H10 + 13O2 → 8CO2 + 10H2O D: 2Ag2O → 4Ag + O2
Answers (1)
Home
»
Physics
» What is power in physics
Sign In
Sign Up
Forgot Password?