A ski gondola is connected to the top of a hill by a steel cable oflength 680 m and diameter 1.5 cm. As thegondola comes to the end of its run, it bumps into the terminal andsends a wave pulse along the cable. It is observed that it took14 s for the pulse to travel the length ofthe cable and then return.
(a) What is the speed of the pulse?
(b) What is the tension in the cable?