Key Equations

What is the formula for kinetic energy?

E_k = ½ x m x v²

What are the units of measurement for m and v in the equation for kinetic energy?

kg, m/s

What is the formula for gravitational potential energy?

Ep = m x g x h

What are the units of measurement for m, g, and h in the equation for gravitational potential energy?

kg, N/kg, m

What is the formula for elastic potential energy?

E_e = ½ x k x e²

What are the units of measurements of k and e in the equation for elastic potential energy?

N/m, m

What is the formula for power?

P = e/t

What are the units of measurement for p, e, and t in the equation for power?

W, J, s

What is the formula for current?

I = Q/t

What does I, Q, and t stand for in the equation for current?

current, charge, time

What are the units of measurement for current (I), and charge (Q)?

amps, coulombs (C)

What is Ohm’s law?

V = IR

What is R in Ohm’s law?

resistance

What is resistance measured in?

Ohms

What is the formula tha links resistance, voltage and current?

R=V/I

What formula links current, power and potential difference?

P=IV

What formula links current, power and resistance?

P=I²R

What equation links weight, mass and gravitational field strength?

W = m x g

What equation links force, spring constant and extension?

F = k x e

What equation links work done, force and distance?

W = F x d

What equation links energy, charge and voltage?

E = Q x V

equation for frequency

f = 1/t

equation that links wave speed, frequency and wavelength

V = fλ

What is v and what is it measured in?

wave speed, m/s

What is f and what is it measured in?

frequency, Hz

What is λ and what is it measured in?

wavelength, m