ESAT Physics Formulae

Current

I = Q/t

Voltage 1

V = E/Q

Voltage 2

V = IR

Power

P = IV = I²R = V²/R

Energy

E = ItV

Total Resistance (3)

R = 1/R1 + 1/R2 + 1/R3…

Total Resistance (2)

R = (R1 * R2)/(R1 + R2)

Total Resistance (any identical)

R = R1/n

Series Circuits

R1/R2 = V1/V2

Transformers

n1/n2 = V1/V2

Velocity

v = s/t

Acceleration

a = change in v / t

Work

W = mg

Force

F = ma

Work/Energy

E = Fd

Power

P = E/t

Pressure

P = F/A

Potential Energy

PE = mgh

Kinetic Energy

KE = 1/2mv²

Momentum

p = mv

Wave Speed

c = fλ

Wave Bounce

Angle of incidence = angle of reflection

Density

q = m/v

Efficiency

Efficiency = useful out / total in

Resistance of wire

R = pL/a

Final velocity

Vf = Vi + at

Final velocity²

Vf² = Vi² + 2ad

Distance

x = Vit + 1/2at²

No acceleration distance

d = 1/2 (vi + Vf)t

Magnetic flux density

F = BILcos()