CIE A Level Physics復(fù)習(xí)筆記6.1.2 Hooke's Law
Hooke's Law A material obeys Hooke’s Law if?its extension is directly proportional to the applied force (load) The Force v Extension graph is a straight line through the origin (see “Extension and ...
CIE A Level Physics復(fù)習(xí)筆記6.1.1 Extension & Compression
Tensile Force Forces don’t just change the motion of a body, but can change the size and?shape?of them too. This is known as?deformation Forces in opposite directions stretch or compress a body Whe...
CIE A Level Physics復(fù)習(xí)筆記5.2.2 Kinetic Energy
Derivation of KE = 1/2mv2 Kinetic energy is energy an object has due to its?motion?(or velocity) A force can make an object accelerate; work is done by the force and energy is transferred to the ob...
CIE A Level Physics復(fù)習(xí)筆記5.2.1 Gravitational Potential Energy
Derivation of GPE = mgh Gravitational potential energy is energy stored in a mass due to its position in a gravitational field When a heavy object is lifted, work is done since the object is provid...
英國留學(xué)生留英就業(yè)，哪些專業(yè)更有優(yōu)勢？
對于眾多留學(xué)生來說，申請英國大學(xué)的時候，除了看學(xué)校的綜合排名、專業(yè)排名之外，還有一個值得參考的重要指標(biāo)，那就是畢業(yè)生就業(yè)情況，希望未來能夠留在英國工作。英國留學(xué)生留英就業(yè)，哪些專業(yè)更有優(yōu)勢？ 01 生...
CIE A Level Physics復(fù)習(xí)筆記5.1.5 Derivation of P = Fv
Derivation of P = Fv Moving power is defined by the equation: This equation is only relevant where a?constant force?moves a body at?constant velocity. Power is required in order to produce an accel...
CIE A Level Physics復(fù)習(xí)筆記5.1.4 Power
Defining Power The power of a machine is the?rate at which it transfers energy Since work done is equal to the energy transferred, power can also be defined as the rate of doing work or?the work do...
CIE A Level Physics復(fù)習(xí)筆記5.1.3 Efficiency
Efficiency of a System The efficiency of a system is?the ratio of the useful energy output from the system to the total energy input If a system has?high?efficiency, this means most of the energy t...
CIE A Level Physics復(fù)習(xí)筆記5.1.2 The Principle of Conservation of Energy
The Principle of Conservation of Energy The Principle of Conservation of Energy states that: Energy cannot be created or destroyed, it can only change from one form to another This means the total ...
CIE A Level Physics復(fù)習(xí)筆記5.1.1 Work & Energy
Work Done In Physics,?work is done?when an?object?is?moved?over a distance by an external force applied in the direction of its displacement In the diagram below, the man’s pushing force on the blo...
CIE A Level Physics復(fù)習(xí)筆記4.2.5 Archimedes Principle
Archimedes' Principle Archimedes’ principle states that an object submerged in a fluid at rest has?an upward buoyancy force (upthrust) equal to the weight of the fluid displaced by the object The o...
CIE A Level Physics復(fù)習(xí)筆記4.2.4 Upthrust
Upthrust Upthrust is a force which pushes upwards on an object submerged in a fluid i.e. liquids and gases Also known as buoyancy force, upthrust is due to the?difference in hydrostatic pressure?at...
