CIE A Level Physics复习笔记7.1.1 Progressive Waves
Wave Motion Energy is transferred through moving oscillations or vibrations. These can be seen in vibrations of ropes or springs Waves can be shown through vibrations in ropes or springs The oscill...
CIE A Level Physics复习笔记6.2.2 Elastic Potential Energy
Area under a Force-Extension Graph The work done in stretching a material is equal to the force multiplied by the distance moved Therefore, the area under a force-extension graph is equal to the wo...
CIE A Level Physics复习笔记6.2.1 Elastic & Plastic Behaviour
Elastic & Plastic Deformation Elastic deformation: when the load is removed, the object will return to its original shape Plastic deformation: when the load is removed, the object will not retu...
CIE A Level Physics复习笔记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复习笔记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复习笔记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复习笔记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复习笔记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...
CIE A Level Physics复习笔记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...
