5. A block of mass m = 6.7-kg is pulled, via pulley, at a constant velocity upwards along an inclined surface that is at an angle of 0 = 42°. The coefficient of kinetic friction is µ = 0.40 between the block and the surface of the incline. Draw all forces acting on the block. (a) Find EFx and EFy. (b) Find the tension in the cord and (c) the normal force acting on the block. (d) If the cord is cut, find the magnitude of the resulting acceleration of the block. (Draw the picture and define your coordinate system for this case & previous showing all forces.) Sketch and Label all the forces

5. A block of mass m = 6.7-kg is pulled, via pulley, at a constant velocity upwards along an inclined surface that is at an angle of 0 = 42°. The coefficient of kinetic friction is µ = 0.40 between the block and the surface of the incline. Draw all forces acting on the block. (a) Find EFx and EFy. (b) Find the tension in the cord and (c) the normal force acting on the block. (d) If the cord is cut, find the magnitude of the resulting acceleration of the block. (Draw the picture and define your coordinate system for this case & previous showing all forces.) Sketch and Label all the forces

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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A 0.85 kg block of wood is stationary on an incline that is15◦above horizontal. A force of 3.0 N is being applied toit 75◦below horizontal, directly into the incline (the force isperpendicular to the incline). What is the minimum coefficientof static friction required to keep the block stationary?
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A 45.0-kg crate of tools rests on a horizontal floor. You exert a gradually increasinghorizontal push on it and observe that the crate just begins to move when your forceexceeds 313 N. After that you must reduce your push to 208 N to keep it moving at asteady 25.0 cm/s. (a) What are the coefficients of static and kinetic friction between thecrate and the floor. (b) what push must you exert to give it an acceleration of 1.10 m/s2 ?
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23. Two identical boxes are being pulled across a horizontal fl oor at aconstant velocity by a horizontal pulling force of 176 N that is applied toone of the boxes, as the drawing shows. There is kinetic friction betweeneach box and the fl oor. Find the tension in the rope between the boxes.
A 3.0 kg block of wood sits on a horizontal wooden floor. The larges force that can be applied before it starts moving is 14.7 N. Once the block starts moving, you only need 8.8N to keep it moving. (a) What is the coefficient of static friction? (b) What is the force of friction acting on the block if you push with a force of 6.8N [E]? (c) Calculate the max static friction if you place a 2.1 kg on top of it (d) What is the kinetic coefficient of friction?
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