3.4.1.8 Conservation of energy Flashcards
1
Q
What is the principle of conservation of energy?
A
Energy cannot be created or destroyed, it can only be transferred from one form to another, but the total amount of energy in a closed system will not change.
2
Q
What is the formula for efficiency in terms of energy?
A
eff. = useful energy output / energy input
3
Q
What is the formula for energy in terms of power?
A
eff. = useful output power/ input power
4
Q
What is the formula for kinetic energy?
A
E_k = 1/2 mv^2
5
Q
What is the formula for gpe?
A
deltaE_p = mgdeltah
6
Q
What is the formula for elastic potential energy?
A
E = 1/2 k (deltaL)^2
