Equations Flashcards
Learn equations by exams
What is equation for weight?
weight = mass x gravitational field strength
kg N/Kg
W=mg
What is equation for work done?
work done = force x distance (along the line of action of the force)
W=Fs
What is the equation for a force applied to a spring?
Force applied to a spring = spring constant x extension
F=ke
What is the equation for moment?
Moment of a force = force x distance
M= Fd
What is the equation for pressure?
Pressure = force / area
P=F/A
What is equation for speed?
Speed= distance/time
S=d/t
What is the equation for acceleration
Acceleration = change in velocity/time taken
a=v/t
What is the equation for resultant force?
Resultant force= mass x acceleration
F=ma
What is the equation for momentum?
Momentum= mass x velocity
kgm/s kg m/s
p=mv
What is the equation for kinetic energy?
Kinetic energy = 0.5 x mass x velocity2
J kg m/s
E=0..5mv2
What is the equation for gravitational potential energy?
gpe= mass x gravitational field strength x height
kg n/kg
gpe= mgh
What is the equation for power?
power= energy transferred or work done/ time
W J J s
p=e/t or p=w/t
What is the equation for efficiency?
efficiency= useful output energy transfer/ total input energy
What is the equation for efficiency?
efficiency= useful power output/ total power input
What is the equation for wave speed?
wave speed = frequency x wavelength
m/s Hz m
What is the equation for charge?
charge flow = current x time
C A s
Q=It
What is the equation for potential difference?
potential difference = current x resistance
V=IR
What is the equation for power?
Power = potential difference x current
P=VI
What is the equation for power?
Power= current2 x resistance
P=I2 R
What is the equation for energy transferred?
Energy transferred = charge flow x potential difference
J C V
E=QV
What is the equation for energy transferred?
Energy transferred = power x time
J W s
E=Pt
What is the equation for density?
Density = mass/volume
kg/m3 kg m3
p=m/v
