Equations Flashcards
1
Q
What is the equation for kinetic energy?
A
Ek = 0.5 x m x v^2
Ek = j
m = kg
v = m/s
2
Q
What is the equation for gravitational potential energy?
A
Ep = m x g x h
Ep = j
m = kg
g = n/kg
h = m
3
Q
What is the equation for work done?
A
w = f x s
w = J
f = N
s = m
4
Q
What is the equation for power?
A
p = e/t
p = w/t
p = W
e = J
t = s
w = J
5
Q
What is the equation for efficiency?
A
efficiency = useful power or energy output/ total power or energy input
efficiency = percentage
useful power = w
useful energy = j
