Final answer:
The safety factor for a grocery sack that can hold a maximum of 230 N and is filled with a load of 180 N is calculated as 1.28, which is option B) 1.28.
Step-by-step explanation:
The safety factor of an object is calculated by dividing the maximum stress or force it can withstand by the actual stress or force applied to it. In this case, the grocery sack can withstand a maximum of 230 N before it rips, and it is filled with a load of 180 N. Therefore, the safety factor is:
Safety Factor = (Maximum Force) / (Actual Force)
Safety Factor = 230 N / 180 N
Safety Factor = 1.28
So, the correct answer to the question 'If the sack is filled with a load of 180 N, what is the safety factor for the sack?' is B) 1.28.