PI.4.4 For a exerted in Unbalanced force Forces that cause a change Systems and system – one or two dimensions, in the motion of an object models mathematically determine the amount of work done on a system by an unbalanced force over a change in position in one dimension. PI.4.5 Understand and apply Conservation of energy principle stating that Scale, proportion, and – the principle of conservation energy cannot be created or destroyed, but can quantity of energy to determine the be altered from one form to another total mechanical energy Mechanical energy ability to do work Energy and matter – stored in a closed system and Closed system region that is isolated from its – mathematically show that the surroundings by a boundary that admits no total mechanical energy of the transfer of matter or energy across it system remains constant as Dissipative scatter in various directions; – long as no dissipative (i.e. disperse non-conservative) forces are present. PI.4.6 Develop and apply Speed measure of the rate of movement of a Cause and effect – pictorial, mathematical or body expressed either as the distance travelled graphical representations to divided by the time taken Stability and change. qualitatively and quantitatively predict changes in the mechanical energy (e.g. translational kinetic, gravitational or elastic potential) of a system due to changes in position or speed of objects or interactions within the system.
PI.4.4 For a exerted in one or two dimensions, mathematically determine the amount of work done on a system by an unbalanced force over a change in position in one dimension. Unbalanced force – Forces that cause a change in the motion of an object Systems and system models PI.4.5 Understand and apply the principle of conservation of energy to determine the total mechanical energy stored in a closed system and mathematically show that the total mechanical energy of the system remains constant as long as no dissipative (i.e. non-conservative) forces are present. Conservation of energy – principle stating that energy cannot be created or destroyed, but can be altered from one form to another Mechanical energy – ability to do work Closed system – region that is isolated from its surroundings by a boundary that admits no transfer of matter or energy across it Dissipative – scatter in various directions; disperse Scale, proportion, and quantity Energy and matter PI.4.6 Develop and apply pictorial, mathematical or graphical representations to qualitatively and quantitatively predict changes in the mechanical energy (e.g. translational kinetic, gravitational or elastic potential) of a system due to changes in position or speed of objects or interactions within the system. Speed – measure of the rate of movement of a body expressed either as the distance travelled divided by the time taken Cause and effect Stability and change.