Equations Flashcards
Force
F=ma, N= kg/ ms^2
Torque
T= f * d. Force must be perpendicular to object to cause rotation … Clockwise is negative
Work
W= FD cos theta
Kinetic energy
KE= 1/2 mv^2
Potential energy
PE= mgh
Mechanical energy
PE + KE
conservation of energy
PEi + KEi= PEf + KEf (Initial= final energy)
Spring force
Force= -kX k= spring constant, x= springs length change
PE spring
PE= 1/2 k X^2
Mechanical advantage
MA= Fo/Fi = output/input force
Speed of light
c= wavelength x f
Photon energy
E photon= hf
Frequency of sound
F= 1/T, where t is the period
Speed of sound
wavelength/ T= wavelength*F as wavelength increases, frequency decreases
Capacitance
C= Q/V in Farads
Energy of capacitance
E=1/2 QV or 1/2CV^2…. due to charge drop (not total voltage)
Force of magnetism
F= Q VB or QVBsin theta
Internal energy equation
Delta U= Q+ W
Work equation
W=P(delta V)
Heat capacity
C= Q/delta T
1 coulomb
6.24x 10^18e and e=1.60 x 10^-19C
Coulombs law
Fe= (k|q1q2|/r^2 Fg=Gm1m2/ r^2
Electric field
forces between charges, E=KQ/d^2, F=qE
Percent yield
Actual/ theoretical x 100%
