Conservation of Energy Flashcards
1
Q
Law of Conservation of Energy
A
The total energy of a system stays constant
Ef=Ei
2
Q
Work
A
W= FΔr cosθ W= F . r W= ∫ F(x) <-- as a function of distance W= ΔK
3
Q
Kinetic Energy
A
1/2 mv^2=K
4
Q
Potential Energy
A
U= mgh
5
Q
Force for a Spring
A
F= -kx
6
Q
Work Done By a Spring
A
U= 1/2kx^2
7
Q
Force as a relation to potential Energy
A
F= - dU/dx
8
Q
Conservative Force
A
- Work done by a conservative force between two points is independent of the path taken
- Work done by a conservative force in a closed path is zero
9
Q
Stable Equilibrium
A
When any move away from the equilibrium position leads to a force pushing it back to equilibrium (concave up)
10
Q
Unstable Equilibrium
A
When any move away from equilibrium could cause the particle to accelerate away from it (Concave down)
11
Q
Neutral Equilibrium
A
When the potential energy is constant for some period of time
12
Q
Conservation of Energy Equation
A
Ki+ Usi + Uki +Win-Wout- Wnc = Kf+ Usf+ Uki
13
Q
Mechanical Energy
A
K + U= E
14
Q
Power
A
P = dW/dt P= F*v
