Work, Energy and Power Flashcards
1
Q
Solving change in potential energy problems
A
Set a zero level of potential energy and compare to that
2
Q
Principle of the conservation of mechanical energy
A
When no external forces do work on a particle during its motion, the sum of the particles kinetic and potential energies remain constant
3
Q
Work energy principle
A
The change in total energy of a particle is equal to the work done on the particle
4
Q
Change in total energy
A
Work done by resistive force - work done by the forward force = change in (kinetic + potential) energies
5
Q
Power formula
A
P = Fv where F is the driving force produced by the engine
6
Q
Work done against friction
A
Frictional force x distance moved
7
Q
1 tonne
A
1000kg
