PHY C4: Power & Efficiency

0.0(0)
studied byStudied by 0 people
learnLearn
examPractice Test
spaced repetitionSpaced Repetition
heart puzzleMatch
flashcardsFlashcards
Card Sorting

1/8

encourage image

There's no tags or description

Looks like no tags are added yet.

Study Analytics
Name
Mastery
Learn
Test
Matching
Spaced

No study sessions yet.

9 Terms

1
New cards

What is Power? (Definition)

The rate of work done or energy transfer with respect to time (P = dW/dt).

2
New cards

What is the formula for Average Power?

(P) = ΔW / Δt.

3
New cards

What is the SI unit for Power?

Watt (W).

4
New cards

What is another common unit of power?

Horsepower.

5
New cards

Is kilowatt-hour (kWh) a unit of power?

No, it is a unit of energy.

6
New cards

What is the formula for Power from a constant force?

P = Fv (where F and v are parallel).

7
New cards

What is Efficiency?

A measure of how much of the total energy input is converted into useful energy output, not "lost" to dissipative forces.

8
New cards

What is the formula for Efficiency?

η = (useful energy output / total energy input) × 100%.

9
New cards

What is the Problem-Solving Technique for Efficiency problems?

Have a clear idea of what "useful energy output" is for the specific scenario (e.g., increase in kinetic energy for accelerating a car).