Equations

Question 1

Gravitational potential energy

Answer 1

Ep = m x h x g
(J) = (kg) x (m) x (N/kg)
Energy = mass x height x gravitational field strength

Question 2

Elastic potential energy

Answer 2

Ee = 1/2 x k x e²
(J) = 1/2 x (N/m) x (m²)
Energy = 1/2 x spring constant x extension²

Question 3

Kinetic energy

Answer 3

Ek = 1/2 x m x v²
(J) = 1/2 x (kg) x (m/s)²
Energy = 1/2 x mass x velocity²

Question 4

Specific heat capacity (thermal energy)

Answer 4

Et = m x c x ø
(J) = (kg) x (j/kg°c) x (°c)
Energy = mass x SHC x temperature change