Final answer:
Beowulf relies on his physical strength and hand-to-hand combat skills when the sword fails. This showcases his bravery, resourcefulness, and determination.
Step-by-step explanation:
When the sword fails, Beowulf relies on his physical strength and hand-to-hand combat skills to fight. This is evident in his battles against Grendel and Grendel's mother, where he uses his bare hands and physical prowess to defeat them. Beowulf's ability to fight without a sword showcases his bravery, resourcefulness, and unwavering determination to protect his people.