1. The problem statement, all variables and given/known data Here are two questions I have some trouble answering : 1- How much work do you do when you hold a bag of groceries while standing STILL? 2- How much work do you do when carrying the same bag on a distance d across the parking lot of the grocery store? 2. Relevant equations We know that ΔK = W 3. The attempt at a solution 1- In the first question , the person stand still so V = 0 and thus ΔK=0 so the work W=0 2- In the second question, when carrying the bag we only have a gravitational work so W= Wg=0 IS IT CORRECT ?