Two rock climbers, Bill and Karen, use
safety ropes of similar length. Karens rope is more elastic, called a dynamic
rope by climbers. Bill has a static rope, not recommended for safety purposes
in pro climbing, (a) Karen falls freely about 2.0m and then the rope stops her
over a distance of 1.0m (Fig. 4-60). Estimate how large a force (assume
constant) she will feel from the rope. (Express the result in multiples of her
weight.) (b) In a similar fall, Bills rope stretches by only 30 cm. How many times
his weight will the rope pull on him? Which climber is more likely to be hurt?