Physics Equations

Physics Equations

1. F = m x a

   • F = resultant force (in one direction) m = mass a = acceleration

2. a = (v-u) ÷ t

   • a = acceleration v= final velocity u = initial velocity t= time

3. W = m x g

   • W = weight m = mass g= gravitational field strength (always 10 on earth)

4. P = E ÷ t

   • P = power E = energy transferred  t = time taken

5. Ek = 1/2 x m x v squared

   • Ek = kinetic energy  m = mass v= speed Remember to square the speed first

6. p = m x v

   • p = momentum m= mass v = velocity  Remember to get the right value for v (they may trick you with 2 values - choose the one that is going in the same direction as what they want you to find). 

7. V = I x R

   • V = potential difference I = current R = Resistance 

8. P = I x V

   • P = power I = current V= potential difference 

9. Ep = mg x g x h

   • Ep = Change in gravitational potential energy  m = mass g = gravitational field strength  h = change in height 

10. I = Q ÷ t

    • I = current Q= charge t = time

11. E = V x Q

    • E = energy V = potential difference Q = charge

12. V = W ÷ Q

    • V = potential difference W = work done Q = charge

13. F = k x e

    • F = force k = spring extension e = extension

14. W = F x d

    • W = work done F = force applied D = distance moved in the direction of the force