Part One
A spring has a natural length of 28.0 cm. If a 24.0-N force is required to keep it stretched to a length of 42.0 cm, how much work W is required to stretch it from 28.0 cm to 35.0 cm? (Round your answer to three decimal places.)
W = ________ J
Part Two
Find the work W done if a constant force of 100 lb is used to pull a cart a distance of 190 ft.
W =__________ ft-lb