Work and energy Flashcards
1
Q
What is the equation for kinetic energy?
A
T=1/2*mv^2
2
Q
What is the equation for work done?
A
W=∫F(x)dx=∫dT=ΔT
3
Q
What is the relationship between work done and kinetic energy?
A
The work done on an object equals the change in its kinetic energy
4
Q
For a conservative force what relates kinetic and potential energy?
A
T+U=E
So the total energy is constant
5
Q
What relates a force and a potential?
A
F=-▽U=-du/dx i^ – du/dy j^ -du/dz k^
6
Q
What relates work and potential energy?
A
ΔU=-W
Or ΔU=W where W is the work you do
7
Q
What is the equation for gravitational potential energy?
A
U(r)=-GMm/r
8
Q
What is the equation for power?
A
dw/dt=F.dr/dt=F.v
Where . means the dot product
9
Q
What is the Lorentz force?
A
The force that acts on a charged particle in an EM field
F=q(E+vxB)
Where x means cross product
