During a flood, a rescue helicopter was used to lift a 79-kg person to safety. The person has an upward acceleration of 0.65 m/s and is lifted from rest to a vertical distance of 13 m. (a) What is the tension on the cable? (b) What is the work done by the tension? (c) What is the work done by the person's weight? (d) What is the speed of the person at 11 m? Use the work-energy theorem to find your answer.
During a flood, a rescue helicopter was used to lift a 79-kg person to safety. The person has an upward acceleration of 0.65 m/s and is lifted from rest to a vertical distance of 13 m. (a) What is the tension on the cable? (b) What is the work done by the tension? (c) What is the work done by the person's weight? (d) What is the speed of the person at 11 m? Use the work-energy theorem to find your answer.
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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the answer must be
(a) 826N
(b) 10,732 J
(c) 10,065 J
(d) 3.8 m/s
Transcribed Image Text:Work – Energy Theorem
7. During a flood, a rescue helicopter was used to lift a 79-kg person to safety. The
has an upward acceleration of 0.65 m/s and is lifted from rest to a yertical
person
distance of 13 m. (a) What is the tension on the cable? (b) What is the work done
by the tension? (c) What is the work done by the person's weight? (d) What is the
speed of the person at 11 m? Use the work-energy theorem to find your answer.
8. Two metal pellets, one with twice the mass of the other, are released from rest at
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