Final answer:
Pablo did 16 joules of work when lifting the bag of flour, using the work formula Work = Force x Distance
Step-by-step explanation:
Work is defined as the product of force and displacement. The formula to calculate work is W = F * d * cos(theta), where W is the work done, F is the force applied, d is the displacement, and theta is the angle between the force and displacement vectors. In this case, Pablo lifted the bag of flour vertically, so the angle between the force and displacement vectors is 0 degrees, and cos(0) = 1. Therefore, the work done by Pablo is given by:
W = F * d
W = 20 N * 0.8 m
W = 16 J (joules)
So, the answer is 16 J (joules).