Energy: equations Flashcards
1
Q
Kinetic energy
A
0.5 x mass x (speed/velocity)2
2
Q
EPE (elastic potential energy)
A
0.5 x spring constant x (extension)2
3
Q
GPE (gravitational potential energy) ??
there’s two
A
mass x height x gravity (10 on earth) // weight x height
4
Q
change in thermal energy??
A
mass x specific heat capacity x temperature change
5
Q
power??
what else can you call what is being divided
A
energy transferred (work done)/ time
6
Q
efficiency??
A
useful energy output/total energy input
7
Q
speed
A
distance/time
8
Q
work done (energy)
joules
A
force x distance
9
Q
force of spring
A
spring constant x extension
10
Q
payback time
A
cost of installation/money saved per year
11
Q
energy?
joules
A
power x time
