You did 200 of work lifting a 150 newton-pack. how high did you lift the bookbag

Given:

200J of work

150N pack

Required:

Height you lift the bookbag

Solution:

Work = mg

Where m is the mass, g is the gravity

200J = m (9.8 m/s2)

M = 20.41 kg

potential energy = mgh

where h is the height

150N = (20.41kg) (9.8 m/s2) h

h = 0.75 m