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The concepts in this problem are similar to those in Multiple Concept Example 4, except that the force doing the work in this problem is the tension in the cable. A rescue helicopter lifts a 79-kg person straight up by means of a cable. The person has an upward acceleration of 0.70 m/s2 and is lifted from rest through a distance of 11 m.
(a) What is the tension in the cable? How much work is done by?
(b) The tension in the cable
(c) The person s weight?
(d) Use the work-energy theorem and find the final speed of the person. |
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