A variable force of
7x^-2
pounds moves an object along a straight line when it is x feet from the origin. Calculate the work done (in ft-lb) in moving the object from x = 1 ft to x = 11ft.
(Round your answer to two decimal places.)
-77.00 ft-lb
work = ∫ force dx
so in this case
work = ∫[1,11] 7/x^2 dx = 70/11