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7 of 7 objectives have lessons · 0 studied · 0 secure
What Cambridge says you should be able to do, in our words. Codes are the topic number plus the objective’s position.
Understand what work is, and recall and use work done = force × displacement in the direction of the force.
Taught in: Work: the energy a force transfers when it moves something, Work when the force is at an angle — and when it is zero · 10 questions
Recall the principle of conservation of energy and apply it.
Taught in: The conservation of energy: nothing is created or destroyed · 5 questions
Recall and understand that efficiency is the ratio of a system’s useful energy output to its total energy input.
Taught in: Efficiency: how much of what you put in comes out useful · 5 questions
Solve problems using the concept of efficiency.
Taught in: Efficiency calculations: output, input and percentages · 5 questions
Define power as the work done per unit time.
Taught in: Power: the rate of energy transfer · 5 questions
Solve problems using P = W / t.
Taught in: Power in practice: motors, cranes and machines · 5 questions
Derive P = Fv and use it to solve problems.
Taught in: P = Fv: power from force and speed · 5 questions