Equations to Know Flashcards
Weight is?
W=
Weight= mass * gravitational field strength
W=mg
What is the gravitational field strength on earth?
g=
g=9.8N/kg
Force applied to a spring is equal to?
F=
Force= spring constant * extension
F=Ke
Acceleration is equal to?
a=
Acceleration= change in velocity/ time
a=∆v/t
Momentum is?
p=
Momentum= mass * velocity p= m v
Gravitational potential energy is?
Ep=
(GPE)= mass * gravitational field strength * height Ep= m g h
In terms of work done power is?
P=
Power= work done/time
P=W/t
Efficiency is?
Efficiency= useful output/total output
Charge flow is?
Q=
Charge flow= current * time
Q= I t
In terms of Potential difference power is?
P=
Power= potential difference * current P= V I
In terms of power energy transfer is?
E=
Energy transfer= power * time
E= P t
Density is?
p=
Density= mass/ volume p= m/V
Work done is?
W=
Work done= force * distance (in line with force)
W= F s
Distance is?
s=
Distance= velocity * time s= v t
Resultant force is?
F=
Resultant force= mass * acceleration
F= m a
Kinetic energy is?
Ek=
Kinetic energy= (1/2) * mass * velocity^2
Ek= (1/2) m v^2
In terms of energy transfer power is?
P=
Power= energy transfer/time P= E/t
Wave speed is?
v=
Wave speed= frequency * wavelength
v= f λ
Potential difference is?
V=
Potential difference= current * resistance
V= I R
In terms of current power is?
P=
Power= current^2 * resistance P= I^2 R
In terms of charge flow energy transfer is?
E=
Energy transfer= charge flow * potential difference
E= Q V
Pressure is?
p=
Pressure= force/area P= F/A
Moment of a force is?
M=
Moment= force * distance from fulcrum M= F d
