1. PHYSICS FORMULAE
Density is mass per unit volume
Density = mass / volume
velocity = displacement / time
Force = rate of change of momentum
Momentum = mass . velocity
Power is rate of work done
Power = work / time
Unit of power is watt
Potential energy (P)
PE = m.g.h
m = mass
g = acceleration due to gravity (9.81m/s2)
h = height
Kinetic energy (P)
P = (1/2).m.v2
m = mass
v = velocity
Ohm's law
V=I.R

2. V = voltage applied
R = Resistance
I = current
Electric power (P) = (voltage applied) x (current)
P = V . I = I2 . R
V = voltage applied
R = Resistance
I = current
OPTICS
Index of refraction
n = c/v
n - index of refraction
c - velocity of light in a vacuum
v - velocity of light in the given material

3. Density is mass per unit volume velocity = displacement / time
Density = mass / volume
Force = rate of change of momentum Momentum = mass . velocity
Power is rate of work done Kinetic energy (P)
Power = work / time P = (1/2).m.v2
Unit of power is watt m = mass
v = velocity
Potential energy (P)
PE = m.g.h
m = mass
g = acceleration due to gravity (9.81m/s2)
h = height
Gravity (Force due to gravity) Acceleration due to gravity at a depth 'd' from earth
Fg : Force of attraction
G : Gravitational constant
M1 : Mass of first object gd = g(1- d
R)
G M1 M2 surface is :
Fg =
r2
M2 : Mass of second object
Acceleration due to gravity at height 'h' from earth Escape velocity
surface is : Escape velocity from a body of mass M and radius r
is
gh = g(1- 2
h )