chapter 7 - energy Flashcards
1
Q
principle of conservation of energy
A
energy cannot be created or destroyed. energy can be transferred from one store to another. the total energy on an isolated system is constant
2
Q
work done (by a constant force)
A
product of the force and the distance moved by an object in the direction of the force
3
Q
power
A
work done or energy transferred per unit time
4
Q
effieciency
A
ratio of energy which was transferred to a useful form compared to the total input energy initially supplied
5
Q
renewable energy source
A
resource that can be replenished naturally quickly enough
6
Q
kinetic energy
A
energy possessed by the object due to its motion
7
Q
gpe
A
energy stored in the object due to its vertical height above ground
