A 61.7 kg carpenter at a construction site plans to swing in a circular arc from one roof top to an adjacent roof at the end of a 11.5 meter rope suspended from a crane boom. if her wiry arms, toughened by years of driving spikes with a no. 22 framing hammer, are capable of exerting 1229 n of force on the rope, what is the maximum speed that she can tolerate at the low point of her swing?