CIE A Level Physics復習筆記6.1.3 The Young Modulus
Stress, Strain & the Young Modulus Stress Tensile stress is the?applied force per unit cross sectional area?of a material Stress equation The?ultimate tensile stress?is the?maximum?force per or...
CIE A Level Physics復習筆記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復習筆記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復習筆記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復習筆記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...
英國留學生留英就業，哪些專業更有優勢？
對于眾多留學生來說，申請英國大學的時候，除了看學校的綜合排名、專業排名之外，還有一個值得參考的重要指標，那就是畢業生就業情況，希望未來能夠留在英國工作。英國留學生留英就業，哪些專業更有優勢？ 01 生...
CIE A Level Physics復習筆記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復習筆記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復習筆記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...
