Physics Equations Flashcards
(20 cards)
Weight
Mass x gravitational field strength (g)
W= m x g
Work done
Force x distance
W= F x s
Force applied to a string
Spring constant x extension
F= k e
Moment of a force
Force x distance
M= f d
Pressure
Face normal to a surface
_____________________________
Area of that surface
P= F
____
A
Distance travelled
Speed x time
S= v t
Acceleration
Change in velocity
_____________________
Time taken
a= (triangle symbol) v
_________________
t
Resultant force
Mass x acceleration
F= m a
Momentum
Mass x velocity
p= m v
Kinetic engergy
0.5 x mass x speed(speed is squared)
Ek= 0.5 m v( v squared)
Gravitational potential energy
Mass x gravitational field strength x height
Ep= m g h
2 equations for power (using joules)
Energy transferred. Work done
____________________. Or. _____________
Time. Time
P= e. Or. P= w
\_\_\_\_. \_\_\_
t. t
Efficiency (2 equations)
Useful output energy transfer. Useful power output
_______________________________. Or. ______________________
Total input energy transfer Total power input
Wave speed=
Frequency x wavelength
v= f (wavelength symbol)
Charge flow=
current x time
Q= I t
Potential difference=
Current x resistance
V= I R
2 equations for Power (involving circuits)=
Potential difference x current P= V I
Or
Current (squared) x resistance. P= I(squared) R
Energy transferred (newtons/seconds)=
Power x time
E= P t
Energy transferred (coulombs)=
Charge flow x potential difference
E= Q V
Density
Mass
________
Volume
(Roe, looks like a p)= m
___
V
