Topic 1a - energy transfers (2. kinetic and potential energy stores)

Question 1

state the equation for kinetic energy

Answer 1

Ek = 1/2mv^2 Ek = kinetic energy (j)
m = mass (kg)
v = speed (m/s)

Question 2

state the equation for gravitation potential energy

Answer 2

Ep = mgh Ep = gpe (j)
m = mass (kg)
g = gravitational field strength (N/kg)
h = height (m)

Question 3

what is the equation for energy transfer for falling objects

Answer 3

the energy lost from gpe store = the energy gained in the kinetic energy store

Question 4

state the equation for elastic potential

Answer 4

Ee = 1/2ke^2 Ee = elastic potential energy (j)
k= spring constant (N/m)
e= extension (m)