block is sliding with a speed of 4.50 m/s on a smooth horizontal surface when, at point P, itounters a rough section. On the rough section, the coefficient of friction is not constant, but starts at00 at point P and increases "linearly" with distance past point P, reaching a value of 0.600 at 12.5mast point P.(a) Use the Work-Energy theorem to find how far this box slides before stopping,(b) What is the coefficient of friction at the stopping point?(c) How far would the box have slid if the friction coefficient did not increase, but instead had aconstant value of 0.100?Answers: (a) 5.11m(b) 0.304 (c) 10.3m5. A 15.0kg stone slides down a snow-covered hill (h = 20.0m high) leaving point A with a speed of10.0m/s. The width, w, of the hill at its base is 15 Om There is no friction on the hill between point A andpoint B (at the bottom of the hill), but there is friction on the level, horizontal ground at the bottom of thehill, between point B and a wall. After entering the rough ground region, the stone travels 100m andthen runs into a very long, light spring ( k= 2.00N/m) attached horizontally to the wall. The coefficientsof friction between the stone and horizontal ground are: us = 0.800 and uk = 0.200.StoneA(a) What is the speed of the stone when it reaches point B?(b) Will the stone move again after it has been stopped by the spring?hAnswers: (a) 22.2 m/s(b) No.springw6. Jane, whose mass is 50.0 kg, needs to swing across a river filled with crocodiles in order to rescueTarzan, whose mass is 80.0 kg. However, she must swing into a constant horizontal wind force, F, on avine that is initially at an angle of 0 with the vertical. In the figure, D = 50.0 m, F = 110 N, L = 40.0 m,and 0 = 50.0°. Note: Tarzan's ledge is a small distance above the end of the vertically hanging rope,since the rope swings on an arc.(a) With what minimum speed must Jane beginher swing in order to just make it to the other side?(Hints: Tarzan is higher than the lowest point ofthe swing. Also, the wind force is constant.s WindiJane(b) Once the rescue is complete, Tarzan and Janemust swing back across the river. With whatminimum speed must they begin their swing?Tarzan

Answered: Image /qna-images/answer/0547f318-9f1c-4837-96a8-70651d4ae043.jpg

lock is sliding with a speed of 4.50 m/s on a smooth horizontal surface when, at point P, it ounters a rough section. On the rough section, the coefficient of friction is not constant, but starts at 00 at point P and increases "linearly" with distance past point P, reaching a value of 0.600 at 12.5m ast point P. (a) Use the Work-Energy theorem to find how far this box slides before stopping. (b) What is the coefficient of friction at the stopping point? (c) How far would the box have slid if the friction coefficient did not increase, but instead had a constant value of 0.100? Answers: (a) 5.11m (b) 0.304 (c) 10.3m

lock is sliding with a speed of 4.50 m/s on a smooth horizontal surface when, at point P, it ounters a rough section. On the rough section, the coefficient of friction is not constant, but starts at 00 at point P and increases "linearly" with distance past point P, reaching a value of 0.600 at 12.5m ast point P. (a) Use the Work-Energy theorem to find how far this box slides before stopping. (b) What is the coefficient of friction at the stopping point? (c) How far would the box have slid if the friction coefficient did not increase, but instead had a constant value of 0.100? Answers: (a) 5.11m (b) 0.304 (c) 10.3m

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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