PHYSICS EQUATIONS: PAPER 1

PHYSICS EQUATIONS: PAPER 1

1. Kinetic energy = 1/2 x mass x velocity2

   • UNITS: J = 1/2 x kg x mps

2. Work done = force x distance

   • UNITS: J = N x M

3. Power = energy transferred / time

   • UNITS: W = J / S

4. Efficiency = useful energy output / total energy in

   • UNITS: % = (J x J) x 100

5. Efficiency = useful power output / total power in

   • UNITS: % = (J x J) x 100

6. Gravitational potential energy = mass x gravitational field strength x height

   • UNITS: J = kg x N/kg x M

7. Charge flow = current x time

   • UNITS: A = A x S

8. Voltage = current x resistance

   • V = A x Ohms

9. Power = voltage x current

   • UNITS: J = V x A

10. Power = current2 x resistance

    • UNITS: J = A x Ohms

11. Energy transferred = power / time

    • UNITS: W = J / S

12. Energy = charge flow x voltage

    • UNITS: W = A x V

13. Density = mass / volume

    • UNITS: G/cm3 / m3

14. Force = Spring constant x extention

    • UNITS: N = N/M x MM