Equations to LEARN :) Flashcards
(61 cards)
kinetic energy =
kinetic energy = 0.5 × mass × speed 2
Ek=
1/2 m x v(squared)
kinetic energy measured in
joules
mass measured in
kg
speed measured in
m/s
weight =
mass × gravitational field strength g
work done=
force × distance (along the line of action of the force)
force applied to a spring=
spring constant × extension
moment of a force =
force × distance (normal to direction of force )
pressure=
force normal to a surface/ area of that surface
distance travelled=
speed × time
acceleration =
change in velocity/ time taken
resultant force =
mass x acceleration
momentum=
mass × velocity
kinetic energy =
0.5 × mass × (speed) squared
gravitational potential energy =
mass × gravitational field strength (g)
× height
equations for power=
(involving time)
energy transferred/ time
OR
work done/time
efficiency=
useful output energy / total input energy
OR
useful power output / total power input
wave speed=
frequency x wavelength
charge flow=
current x time
potential difference=
current × resistance
all 4 equations for power=
= potential difference × current
= current squared × resistance
= work done/ time
= energy transferred/ time
energy transferred equations=
power x time
charge flow x potential difference
energy transferred equation=
(involving pd)
= charge flow × potential difference
