energy,efficency and equations Flashcards
1
Q
what are the energy stores
A
chemical,nuclear,gravitiantol potenial,kinetic, thermal ,elastic potential ,
2
Q
how can energy be transferred
A
heating , waves, electric current or force
3
Q
what is the formula for work done
A
work done =force applied x distance
4
Q
what is the formula for change in objects gravitanol potenial energy store
A
weight x change in height
5
Q
what is the formula for change in objects gravitional potenital energy store for mass
A
mass x gravititanol field strength x change in height
6
Q
what the formula of elastic potential energy ee
A
1/2 x spring constant x extension squared
7
Q
formula for kinetic energy (eK)
A
1/2 x mass x velocity squared
8
Q
formula of efficency
A
useful output transferred by device divided by total input
