A rescue helicopter lifts a 70 kg person straight up by means of a cable. The person has an

Question

upward acceleration of 0.70 m/s2
and is lifted from rest through a distance of 9 m.
 What is the tension in the cable?
 How much work is done by the tension in the cable?
 How much work is done by the person's weight?
 Use the work-energy theorem and find the final speed of the person.