05 - work, energy, and power Flashcards
1
Q
work done
A
force x distance moved in direction of force
2
Q
energy
A
the capacity to do work
3
Q
principle of conservation of energy
A
total energy of a closed system remains constant: energy cannot be created or destroyed, only transferred from one form to another
4
Q
kinetic energy (KE)
A
the energy associated with an object as a result of its motion
5
Q
equation for KE (not given in formula booklet)
A
Ek = (1/2)mv^2
6
Q
gravitational potential energy (GPE)
A
the capacity for doing work as a result of an object’s position in a gravitational field
7
Q
equation for GPE (not given in formula book)
A
Ep = mgh
8
Q
power
A
rate of work done / energy transfer
9
Q
efficiency
A
ratio of useful output energy to total input energy
