Power in practice

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Lessons are for learners and teachers with an account. Browsing the curriculum — subjects, strands and what each sub-strand covers — stays open to everyone.

• 10 sections of explanation, worked examples and diagrams
• 1 practice task with hints and worked answers
• A quiz that marks itself as you go
• Your progress kept across every subject you take

Other lessons in this sub-strand

1. Work and energy
2. Power, and what a machine actually does
3. The simple machines
4. Forms of energy and how they change
5. Work when the force is at an angle
6. Kinetic energy and the square of speed
7. Gravitational potential energy
8. Elastic potential energy
9. Conserving mechanical energy
10. Power in practice
11. Three classes of levers
12. Pulley systems
13. The inclined plane and the screw
14. Wheel and axle, gears and pulley belts
15. Hydraulic machines
16. Measuring M.A., V.R. and efficiency
17. Efficiency, friction and a heavier load
18. Machines around Kenya