AQA A Level Physics復習筆記4.6.3 Efficiency
Efficiency The efficiency of a system is a measure of how well energy is transferred in a system Efficiency is defined as?the ratio of the useful power output from a system to its total powe...
衛報：A-level學生申請頂尖大學錄取率大幅下降！
《衛報》： A-level學生申請頂尖大學錄取率降至55%！ 成千上萬名優秀A-level學生不會獲得頂尖大學offer！ A-level學生申請頂尖大學錄取率降至55% 根據《衛報》報道，英國高等院校招生辦公室(UCAS)的數據顯示，申...
AQA A Level Physics復習筆記4.6.2 Area Under a Force-Displacement Graph
Area Under a Force-Displacement Graph The work done can also be found from a force-displacement graph If the force is not constant and is plotted against the displacement of the object: The ...
AQA A Level Physics復習筆記4.6.1 Work & Power
Work & Power Work is defined as The amount of energy transferred when an external force causes an object to move over a certain distance If the force is parallel to the direction of the ...
AQA A Level Physics復習筆記4.5.5 Collisions
Elastic & Inelastic Collisions In both collisions and explosions, momentum is always conserved However,?kinetic energy?might not always be A collision (or explosion) is either: Elastic?–...
AQA A Level Physics復習筆記4.5.4 Impulse on a Force-Time Graph
Impulse of a Force-Time Graph In real life, forces are often not constant and will vary over time If the force is plotted against time,?the impulse is equal to the area under the force-time ...
AQA A Level Physics復習筆記4.5.3 Impulse
Force & Momentum Force is defined as the?rate of change of momentum?on a body The change in momentum is defined as the final momentum minus the initial momentum These can be expressed as...
AQA A Level Physics復習筆記4.5.2 Conservation of Momentum
The Principle of Conservation of Momentum The principle of conservation of linear momentum states: The total momentum before a collision = the total momentum after a collision provided no ex...
AQA A Level Physics復習筆記4.5.1 Linear Momentum
Linear Momentum Linear momentum (p) is defined as the product of mass and velocity Momentum is the product of mass and velocity Momentum is a vector quantity - it has both a magnitude...
