Formulae Flashcards
Weight=
=mass*gravitational field strength
W=m*g
Work done=
=force *distance(along the line of force)
W=F*s
Power=
=energy transferred / time (P=E/t)
=work done / time (P=w/t)
=potential difference * current (P=V*I)
=current^2 * resistance (P=I^2*R)
Force applied to a spring=
=spring constant * extension
F=k*e
Moment of force=
=force * distance (normal to direction of force)
M=F*d
Pressure=
=force normal to a surface/area of that surface
p=F/A
Distance travelled =
=speed * time
s=v*t
Acceleration =
=change in velocity / time taken
a=(v-u)/t
Resultant force=
=mass * acceleration
F=m*a
Momentum=
=mass * velocity
p=m*v
Kinetic energy=
=0.5 * mass *velocity^2
Ek=0.5mv^2
Gravitational potential energy=
=mass * gravitational field strength * height
Ep=mgh
Efficiency =
=useful output energy transfer / total input energy transfer
=useful power output / total power input
Wave speed=
=frequency * wavelength
v=f*wl
Charge flow=
=current * time
Q=I*t
Potential difference=
=current * resistance
V=I*R
Energy transferred =
=power * time (E=P*t)
=Charge flow * potential difference (E=Q*V)
Density =
=mass / volume
ρ=m/v
Resistance=
Potential difference/ current
Pressure in a liquid=
=height of column of liquid * density * gravitational field strength
p=hρg
Force=
=change in momentum / change in time
F=(m*Δv) / Δt
