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Work, Energy, Power & Mechanical Advantage of Simple Machines ⚙️
SSS 1 - 3Work-Energy Theorem and Mechanical Systems•Module 1 • Lesson 2•Est. 25 mins
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Section 1 of 3
Work and Power in Physical Systems 🏗️
### Work Done by a Force:
In physics, **Work** is defined as the product of force and distance moved **in the direction of the force**:
$$W = F \cdot d \cos\theta \quad (\text{Joules, J})$$
* If an object does not move ($d = 0$), work done is zero regardless of how much effort is exerted!
**Power** is the rate of doing work or transferring energy:
$$P = \frac{W}{t} \quad (\text{Watts, W, where } 1\text{ W} = 1\text{ J/s})$$
Core Takeaway: Work is force × displacement in direction of force. Power is work ÷ time.
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Dr. (Mrs.) Adebayo
Senior Secondary & WAEC/JAMB Senior Fellow
Teacher Emeka•12:25 PM
Good day, scholar. 📚 I am Dr. Adebayo. Our mission is academic excellence and mastery of your senior secondary curriculum for top grades in WAEC and JAMB.