← Power Mechanics / 1 Fundamentals of Power Mechanics
1.1 Principles of Power Mechanics
Power Mechanics · Grade 11 · 6 lessons in the design
What you will be able to do
- explain the fundamental principles of power mechanics
- apply fundamental principles of power mechanics to work out exercises
- describe the types of power transmitters used in power mechanics
- identify tools used in power mechanics
- recognise the importance of principles of power mechanics
Key questions
“How is knowledge on principles of Power Mechanics applied in day-to-day life?”
Lessons
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Force, work and energy
40 min · 1 practice tasks · quizCalculate work done by a force, kinetic energy and a gain in potential energy as three separate workshop cases.
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Power and efficiency
40 min · 1 practice tasks · quizFind useful power from work and time, check it with force times speed, and find an efficiency below 100 percent.
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Torque
40 min · 1 practice tasks · quizCalculate the turning effect of a pull at right angles to a spanner, and see why a pull aimed at the nut does nothing.
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Motion and inertia
40 min · 1 practice tasks · quizFind a constant acceleration and the distance travelled, then compare the accelerations of two masses under one force.
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Friction
40 min · 1 practice tasks · quizSeparate a small push that does not start a crate from the kinetic friction once it is sliding, then find the acceleration.
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Power transmitters and hand tools
40 min · 1 practice tasks · quizDescribe the transmitters that pass on torque, calculate one gear speed, and identify the spanners, keys and jacks with the principle each one uses.