Physics equation revision (P1, P2 & P3)

Kinetic Energy equation

• KE= 0.5 x m x (v)2
• KE= 0.5 x m x v

• KE= 1/2 x m x S

• KE= 0.5 x h x (v)2

Gravitational Potential Energy equation

• GPE= m x h x v

• GPE= m x g x h

• GPE= 0.5 x m x g

• GPE= m x h x h

Efficiency in terms of power:

• Efficiency = total power output/useful power input

• Efficiency = useful power input/ total power input

• Efficiency = useful power output/ total power input

• Efficiency = total power input/ total power output

Equation linking power, energy and time

• Power= energy/time

• Power= energy x time

• Energy= power/time

• Power= energy/work done

Equation linking charge, time and current

• Q= I/t

• Q= I x t

• Q= t/I

• Q= t x I

Unit for resistance

• Volts

• Amps

• Ohms

• Coulombs

Equation linking potential difference, current and resistance:

• current = potential difference x resistance

• potential difference = current x resistance

• resistance = current x potential difference

• potential difference = current / resistance

Power in terms of resistance and current

• Power = current x resistance

• Power= current / resistance

• Power = (current)2/ resistance

• Power = (current)2 x resistance

Power in terms of potential difference and current:

• P = I x V

• P = I / V

• P = I x Q

• P = I x R

Energy, Charge , Potential difference

• E= Q x V

• E = I x C

• E= Q x I

• E = Q x C