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A box weighing 100N is at rest on a horizontal floor. The coefficient of the static friction sin between the box and the floor is 0.4. What is the Fcos e smallest force exerted eastward and upward at an angle of 30" with the horizontal that can start the box in motion?

A box weighing 100N is at rest on a horizontal floor. The coefficient of the static friction sin between the box and the floor is 0.4. What is the Fcos e smallest force exerted eastward and upward at an angle of 30" with the horizontal that can start the box in motion?

College Physics
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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* Untitled Question A box weighing 100 N is at rest on a horizontal floor. The coefficient of the static friction Fsin e between the box and the floor is 0.4. What is the - Mr smallest foree exerted castward and upward at an angle of 30" with the horizontal that can start the F cos 6 box in motion? Q2: Use dimensional analysis to determine which of the following equation is certainly wrong: Where i. and h are the lengths and | F] = [MLTJ. The other symbols have their usual meaning? Q3: What is the sum å + b if å (-4.0 m) i+(3.0 m) jand b ( -11.0 m) i+ (7.0m)j? What are the (b) magnitude and (c) direction of a + b Q4: Figure shows three forces applied to a trunk that moves leftward by 3.00 m over a frictionless floor. The force magnitudes are F1 = 7.00 Ib, F2 = 10.00 Ibs and F3= 3.00N, and the indi le O g ne unspeeent, (a) what is the net work done on the trunk by the three fortes and (b) does the kinetic energy of the trunk increase or decrease?
Transcribed Image Text:* Untitled Question A box weighing 100 N is at rest on a horizontal floor. The coefficient of the static friction Fsin e between the box and the floor is 0.4. What is the - Mr smallest foree exerted castward and upward at an angle of 30" with the horizontal that can start the F cos 6 box in motion? Q2: Use dimensional analysis to determine which of the following equation is certainly wrong: Where i. and h are the lengths and | F] = [MLTJ. The other symbols have their usual meaning? Q3: What is the sum å + b if å (-4.0 m) i+(3.0 m) jand b ( -11.0 m) i+ (7.0m)j? What are the (b) magnitude and (c) direction of a + b Q4: Figure shows three forces applied to a trunk that moves leftward by 3.00 m over a frictionless floor. The force magnitudes are F1 = 7.00 Ib, F2 = 10.00 Ibs and F3= 3.00N, and the indi le O g ne unspeeent, (a) what is the net work done on the trunk by the three fortes and (b) does the kinetic energy of the trunk increase or decrease?
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