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...
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...
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...
Derivation of ∆p = ρg∆h Hydrostatic pressure is the pressure that is exerted by a fluid at equilibrium at a given point within the fluid, due to the force of gravity The derivation for this equatio...
