2. A 350 kg sofa slides 2.5m down a 30° incline and is kept from accelerating by a woman who is pushing back on it parallel to the incline. If uk .3, calculate (a) the force exerted by the woman on the sofa, (b) the work done by the woman on the sofa, (c) the work done by the friction force, n (d) the work done by gravity, and (e) the net work done on the sofa. (f) Explain why the answer to b) would be different if the sofa was sliding up.
2. A 350 kg sofa slides 2.5m down a 30° incline and is kept from accelerating by a woman who is pushing back on it parallel to the incline. If uk .3, calculate (a) the force exerted by the woman on the sofa, (b) the work done by the woman on the sofa, (c) the work done by the friction force, n (d) the work done by gravity, and (e) the net work done on the sofa. (f) Explain why the answer to b) would be different if the sofa was sliding up.
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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#2 a,b,c
![2. A 350 kg sofa slides 2.5m down a 30° incline and is kept from accelerating by a woman
who is pushing back on it parallel to the incline. If uk = .3, calculate
(a) the force exerted by the woman on the sofa,
(b) the work done by the woman on the sofa,
(c) the work done by the friction force,
(d) the work done by gravity, and
(e) the net work done on the sofa.
(f) Explain why the answer to b) would be different if the sofa was sliding up.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F1af144b1-86f1-4bbf-876f-693f648ad264%2F599bc633-9926-45a1-a883-aa2e0008eceb%2Fisrla92_processed.jpeg&w=3840&q=75)
Transcribed Image Text:2. A 350 kg sofa slides 2.5m down a 30° incline and is kept from accelerating by a woman
who is pushing back on it parallel to the incline. If uk = .3, calculate
(a) the force exerted by the woman on the sofa,
(b) the work done by the woman on the sofa,
(c) the work done by the friction force,
(d) the work done by gravity, and
(e) the net work done on the sofa.
(f) Explain why the answer to b) would be different if the sofa was sliding up.
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