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...
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...
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 ...
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...
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...
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...
对于众多留学生来说，申请英国大学的时候，除了看学校的综合排名、专业排名之外，还有一个值得参考的重要指标，那就是毕业生就业情况，希望未来能够留在英国工作。英国留学生留英就业，哪些专业更有优势？ 01 生...
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...
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...
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...
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 ...
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...
