A 63.2-kg
climber finds herself dangling over the edge of a cliff . Fortunately, she’s connected by a rope of negligible mass to a rock located 48.6 m
from the edge of the cliff, and help is on the way. Unfortunately, it will be 36.5 s
before help arrives, and the ice is frictionless.
How massive must the rock be if she’s to be saved?
