6.2 Work Done

Question 1

What is ‘work done’ ?

Answer 1

Work done is the energy transferred when a force moves an object through a distance

Question 2

What is the formula for work done?

Answer 2

E = F * d

E = work done (J)
F = force (N)
d = distance moved in the direction of the force (m)

Question 3

What is the formula for the change in GPE?

Answer 3

Change in GPE = m * g * change in h

m = mass (kg)
g = gravitational field strength (N/kg)
h = height (m)

Question 4

What is the formula for kinetic energy?

Answer 4

KE = 1/2 * m * v^2

KE = kinetic energy (J)
m = mass (kg)
v = speed (m/s)