Final answer:
Pablo did 16 joules (J) of work on the bag of flour by lifting it with a 20 N force through a distance of 0.8m, calculated as W = F × d.
Step-by-step explanation:
The question asks us to calculate the work done by Pablo when he lifts a bag of flour from the floor to a table. The formula for work done (W) is the product of the force applied (F) and the displacement in the direction of the force (d), which is W = F × d. In this problem, Pablo lifts the bag using a 20 N force through a vertical distance of 0.8 m.
Using the work formula, we multiply the force (20 N) by the distance (0.8 m) to find the work done:
W = 20 N × 0.8 m = 16 J
Therefore, the answer to the question is a. 16 J.