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...
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 ...
