Final answer:
The specific force that will tear off the handles of a grocery bag cannot be determined without knowledge of the handle material's tensile strength. The force that causes failure will be the one that exceeds this strength limit.
Step-by-step explanation:
The force that will tear off the handles of a grocery bag is determined by the strength of the material and the point at which the force applied exceeds the handle's tensile strength. Without information on material strength, we are unable to provide which specific value of force (52.0 N, 50.0 N, 55.0 N, or 60.0 N) will tear the handles off. However, it is a principle of physics that the force which causes failure will be the one that exceeds the strength limit of the handles.