While Grendel's mother is hard for Beowulf to defeat, he IS able to use a sword, where as he has to battle Grendel bare handed.
Hrothgar asks Beowulf to battle Grendel's mother because she is seeking revenge for Grendel's death, posing a new threat to the kingdom. Beowulf's bravery and skill in defeating Grendel make him the best candidate for facing this new challenge.
Beowulf gets hold of Grendel arms. Grendel cant handle the pain and wants to return back to its den. But Beowulfs immence hands rip of Grendels and Beowulf slauters Beowulf.
In Beowulf, he is a static character, but in Grendel, he is a dynamic character.
Grendels arm If its after the fight with Grendel's Mother then he took Grendel's head, the sword-hilt of the sword he used to slay Grendel's mother and cut off Grendel's head, and of course Hrunting the sword he originally brought to slay Grendel's Mother which was ineffective against her tough hide.
While Beowulf fights Grendel in Herot, a mead hall owned by Hrothgar (king of the Danes), he fights Grendel's mother in her underwater castle in a nearby lake.
Yes, Beowulf does fight Grendels mother, they fight in her lair. He chops off her head.
"Beowulf" consists of three main parts: the battle with Grendel, the battle with Grendel's mother, and the battle with the dragon. Each part highlights a different heroic feat of the protagonist, Beowulf.
Underwater, in a lake.
Beowulf and Grendel's mother fought in her underwater lair at the bottom of a dark, eerie mere (a kind of lake). The battle took place in the depths of the water, adding to the suspense and danger of the encounter.
Beowulf's sword is useless against Grendel's mother because her skin is too tough for it to penetrate. The sword shatters upon impact, leaving Beowulf vulnerable in the battle. Ultimately, it is Beowulf's strength and willpower that allow him to defeat Grendel's mother.
While Grendel's mother is hard for Beowulf to defeat, he IS able to use a sword, where as he has to battle Grendel bare handed.