Work, Energy and Power Flashcards
What is the equation for work done by a variable force?
What is the equation for work done by a constant force on a straight line?
What is the fundamental equation for demonstrating conservative forces and potential energy and work done?
What is the equation for gravitational potential energy, Vg?
Try derive from an object moving up, using work done equation.
For gravitational attraction, is it conservative? What is the equation for potential energy using newtons gravitational attraction equation?
What is the equation for elastic potential? Is it conservative?
Try derive it from the work done equation.
What is the equation for kinetic friction energy? Is it conservative?
Try derive it from the work done equation.
What is the condition and the equation for static friction work done?
What is the principle of work and energy equation and kinetic energy equation?
Try to derive it from F=ma for tangential force.
What is the final form of the work energy principle equation, applying it to kinetic energy alone first?
What is the more formally used work energy principle equation, applying it to conservative forces?
Hint: what are the two main conservative forces?
Note:
* The Vmech referes to mechanical energy. Which is the gravitaitonal and the kinetic energies combined.
* The difference in work summed, refers to work done by by all the non-conservative forces.
* Therefore, if only conservative forces are acting on a particle, then the final and inital kinetic and potential energies are equal.
What is the work energy principle equation for systems of particles?
Note:
* We assume that the work of all the internal forces between particles occur in equal and opposite coolinear pairs, therefore cancel out.
* We only consider the external forces and the sum.
* The Vmech 1 and 2 refer to potential energy in this case
What is the power equation?
What is the equation for mechanical efficiency?
