Figure shows a block of mass m resting on a 20° slope. The block has coefficients of friction μ = 0.77 and x = 0.54 with the surface. It is connected via a massless string over a massless, frictionless pulley to a hanging block of mass 2.0 kg. (Figure 1) You may want to review (Page). For help with math skills, you may want to review: Vector Components Figure m 20⁰ 1 of 1 2 kg Part A What is the minimum mass m that will stick and not slip? Express your answer to three significant figures and include the appropriate units. m = Submit Part B a = Value 1 Submit μA If this minimum mass is nudged ever so slightly, it will start being pulled up the incline. What acceleration will it have? Express your answer to three significant figures and include the appropriate units. Request Answer Provide Feedback μA Value kg Request Answer m/s² ? p Pang ?

Figure shows a block of mass m resting on a 20° slope. The block has coefficients of friction μ = 0.77 and x = 0.54 with the surface. It is connected via a massless string over a massless, frictionless pulley to a hanging block of mass 2.0 kg. (Figure 1) You may want to review (Page). For help with math skills, you may want to review: Vector Components Figure m 20⁰ 1 of 1 2 kg Part A What is the minimum mass m that will stick and not slip? Express your answer to three significant figures and include the appropriate units. m = Submit Part B a = Value 1 Submit μA If this minimum mass is nudged ever so slightly, it will start being pulled up the incline. What acceleration will it have? Express your answer to three significant figures and include the appropriate units. Request Answer Provide Feedback μA Value kg Request Answer m/s² ? p Pang ?

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter2: Vectors

Section: Chapter Questions

Problem 26P: In a tug-of-war game on one campus, 15 students pull on a rope at both ends in an effort to displace...

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In a tug-of-war game on one campus, 15 students pull on a rope at both ends in an effort to displace the central knot to one side or the other. Two students pull with force 196 N each to the light, four students pull with force 98 N each to the left, five students pull with force 62 N each to the left, three students pull with force 150 N each to the right, and one student pulls with force 250 N to the left. Assuming the positive direction to the tight, express the net pull on the knot in terms of the unit vector. How big is the net pull on the knot? In what direction?
Figure shows a block of mass m resting on a 20° slope. The block has coefficients of friction μ = 0.81 and k = 0.46 with the surface. It is connected via a massless string over a massless, frictionless pulley to a hanging block of mass 2.0 kg. (Figure 1) You may want to review (Page). For help with math skills, you may want to review: Vector Components Figure m 20⁰ 1 of 1 2 kg Part A What is the minimum mass m that will stick and not slip? Express your answer to three significant figures and include the appropriate units. m = Submit Part B a = Submit O μA Value Request Answer If this minimum mass is nudged ever so slightly, it will start being pulled up the incline. What acceleration will it have? Express your answer to three significant figures and include the appropriate units. μÅ Provide Feedback Value kg Request Answer ? 2 m/s² ?
A force is specified by the vector F = (190i + 80j - 100k) N. Calculate the angles made by F with the positive x-, y-, and z-axes. Answers: O ex= i i
A desperate hiker has to think fast to help his friend who has fallen below him. Quickly, he ties a rope to a rock of mA = 405 kg and makes his way over the ledge (see the figure below). If the coefficient of static friction between the rock and the ground is H=0.348, and the mass of the hiker is ma= 70.1 kg, what is the maximum mass of the friend, mc, that the rock can hold so the hikers can then make their way up over the ledge? Assume the rope is parallel to the ground and the point where the rope passes over the ledge is frictionless. (ANS: 70.8 kg)
An object with a mass of 1.76 kg is initially at rest upon a horizontal, frictionless surface. An applied force of 3.04 N i acts on the object for 2.08 s. What is the object's final speed? Enter a number rounded to 2 decimal places and assume the answer has proper SI Units.
Mountain pull. A large mountain can slightly affect the direction of “down” as determined by a plumb line. Assume that we can model a mountain as a sphere of radius R=2.00 km and density (mass per unit volume) 2.6*103 kg/m3. Assume also that we hang a 0.50 m plumb line at a distance of 3R from the sphere’s center and such that the sphere pulls horizontally on the lower end. How far would the lower end move toward the sphere?
wo forces are acting on a 1.08 kg object. One force is directed completely in the negative x direction and has a magnitude of 8.3 N, The second force has a magnitude of 7.5 N and is directed 28∘28∘ to the right of the negative y axis. Assume standard Cartesian coordinates. Find the magnitude of the acceleration of the object
2. An air track is set to be perfectly level on a lab table, and the glider (total mass 120 grams) is attached by a string of negligible mass, over a pulley with negligible friction, to a hanging mass of 75 grams. Sketch the system, and include arrows to show all the forces acting on the two objects (glider and hanging mass). (b) Label all the force vectors with their magnitudes. (c) Write an equation for Newton's 2nd Law for each of the two objects. (d) Solve for the acceleration of the glider and the tension in the string.
Two packages at UPS start sliding down the 20° ramp shown in the figure. Package A has a mass of 4.50 kg and a coefficient of kinetic friction of 0.190. Package B has a mass of 9.00 kg and a coefficient of kinetic friction of 0.170. (Figure 1) You may want to review (Page 159). For help with math skills, you may want to review: Vector Components Figure 2 m 20° A B 1 of 1
consider a force vector = 300 g at the 40º angle. resolve this vector into its x- and y-components by the following methods: a) graphical: make the x- and y-axes. use a scale of 30 g = 1.0 cm, and draw an arrow of appropriate length at 40º. drop perpendiculars from the tip of the vector to the x- and y-axes. measure the lengths of these lines and hence find the magnitudes of fx and fy. (do not calculate using trigonometry) record the results. b) analytical: compute the magnitudes of fx and fy by using the component method (equations 3-3 and 3-4). record the results.
As shown in the attached figure below, three force vectors act on an object. The magnitudes of the forces are F1= 80.0 N, F2 = 60.0 N, and F3 = 40.0 N, where N is the standard SI unit of force. The resultant force acting on the object is given by A. 40.0 N at an angle 60.0° below +x-axis B. 60.0 N at an angle 90.0° above +x-axis C. 20.0 N at an angle 34.3° below +x-axis D. 180 N at an angle 60.0° below +x-axis E. 35.5 N at an angle 34.3° above +x-axis
Fy 30° Problem 04. (D-EVEN) If F, = 400lb and F3 = 800lb, determine the magnitude of F1. Also, specify the magnitude and coordinate direction angles a1, ß1, Y1 of F1 so that the resultant of the three forces acting on the bracket is FR = -700k lb. Note that F3 lies in the x-y plane. Hint: k is the unit vector along z-axis.