energy, work, power Flashcards
1
Q
What is the Law of conservation of energy?
A
Energy can neither be created nor destroyed, only changed from one form to another, or transferred from one body to another. The total amount of energy in an internal system remains constant.
2
Q
What is the formula for kinetic energy?
A
½ mv2
3
Q
What is the formula for gravitational potential energy?
A
mgh
4
Q
What is work done?
A
Work done: Force x distance (distance moved in the direction of the force)
5
Q
What is the formula for power?
A
work done / time
6
Q
What is the formula for efficiency?
A
(Energy converted to useful output / total energy input) x 100
7
Q
Complete the eqn: Initial energy =
A
Initial energy = final energy + net work done
