A and B went to rock climbing. A and B used similar length rope but Arope is more elastic,which stretches a bit. B has static rope,which doesn't stretch,and is not recommended for safety purpose in procliming. after climbing to the top of bulding1700, A steps off the roof and falls freely about 3.0m and then therope stops him over a distace of 1.2m.
a) draw a free body diagram of A as he reaches the point wherehis rope starts to stretch.
b) assuming the rope provides a relatively constant force overthat distance,estimate the force A feels from the rope.
c) simialrly of B.