Concept explainers
SSM WWWA cubical box is filled with sand and weighs 890 N. We wish to “roll” the box by pushing horizontally on one of the upper edges. (a) What minimum force is required? (b) What minimum coefficient of static friction between box and floor is required? (c) If there is a more efficient way to roll the box, find the smallest possible force that would have to be applied directly to the box to roll it. (Hint: At the onset of tipping, where is the normal force located?)
Want to see the full answer?
Check out a sample textbook solutionChapter 12 Solutions
Fundamentals Of Physics - Volume 1 Only
Additional Science Textbook Solutions
Conceptual Integrated Science
The Cosmic Perspective Fundamentals (2nd Edition)
Cosmic Perspective Fundamentals
Glencoe Physical Science 2012 Student Edition (Glencoe Science) (McGraw-Hill Education)
Introduction to Electrodynamics
Physics (5th Edition)
- Suppose three forces with magnitudes of 198 N, 275 N, and 205 N are placed in equilibrium. If the 205-N force acts in the +y-direction, what is one of the two configurations in the xy-plane that the remaining forces may have? Give numerical values for the angles.arrow_forwardOne end of a uniform meter stick is placed against a vertical wall. The other end is held by a lightweight cord that makes an angle ? with the stick. The coefficient of static friction between the end of the meter stick and the wall is 0.400. When theta = 15.0o , how large must the coefficient of static friction be so that the block can be attached 0.100 [m] from the left end of the stick without causing it to slip?arrow_forwardAt what height in (A) must the wooden board be inclined such that the maximum static friction is obtained when the angle of repose is 32.4°?arrow_forward
- The walkway ABC of the footbridge is stiffened by adding the cable ADC and the short post of length L. If the tension in the cable is not to exceed 420 lb, what is the smallest value of L for which the 160-lb person can be supported at B?arrow_forwardA uniform box is placed in a position along the inclined plane which makes an angle θ from the horizontal. Coefficient of static friction µ = 0.4. What should be the maximum value of angle θ so that the box would remain at rest?arrow_forwardA block of weight W=100 is on a rough plane inclined at an angle of 30 degrees with the horizontal. The magnitude of the normal force N1 and the friction F1 when the block is in equilibrium. If the plane was frictionless, find the magnitude of the horizontal force F1, required to keep the block in equilibrium.arrow_forward
- A house is built on the top of a hill with a nearby slope at angle u = 45 . An engineering study indicates that the slope angle should be reduced because the top layers of soil along the slope might slip past the lower layers. If the coefficient of static friction between two such layers is 0.5, what is the least angle f through which the present slope should be reduced to prevent slippage?arrow_forwardA 30 kN horizontal force and 40 kN vertical force is directed 53 degrees wrt x axis to the upper right, at what angle (in degrees) will forces of the same magnitude be directed to the lower left to produce equilibrium?arrow_forwardA uniform horizontal beam 5.00 m long and weighting 3.03 102 N is attached to a wall by a pin connection that allows the beam to rotate. Its far end is supported by a cable that makes an angle of 53.0° with the horizontal (Figure (a)). If a person weighing 6.05 102 N stands 1.60 m from the wall, find the magnitude of the tension in the cable and the force exerted by the wall on the beam. T = N Rx = N Ry = N Even if we selected some other axis for the torque equation, the solution would be the same. For example, if the axis were to pass through the center of gravity of the beam, the torque equation would involve both T and Ry. Together with Equations (1) and (2), however, the unknowns could still be found—a good exercise. In this example, notice the steps of the Problem-Solving Strategy could be carried out in the explicit recommended order.QUESTION What happens to the tension in the cable if the man in Figure (a) moves farther away from the wall? The tension would…arrow_forward
- A 90-m wire is suspended between two points at the same elevation that are 60 m apart. Knowing that the maximum tension is 300 N, determine (a) the sag of the wire, (b) the total mass of the wire.arrow_forwardFor the beam and loading shown, determine the tension in cable BC if P = 165.8, Q = 249.3, R = 355.4, S = 268.2, T = 117, a = 9.38, and b = 12.47. Round off only on the final answer expressed in 3 decimal places .arrow_forwardA block of mass 4.20 kg is pushed up against a wall by a force P that makes an angle of θ = 50.0°angle with the horizontal as shown below. The coefficient of static friction between the block and the wall is 0.270.arrow_forward
- College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage LearningUniversity Physics (14th Edition)PhysicsISBN:9780133969290Author:Hugh D. Young, Roger A. FreedmanPublisher:PEARSONIntroduction To Quantum MechanicsPhysicsISBN:9781107189638Author:Griffiths, David J., Schroeter, Darrell F.Publisher:Cambridge University Press
- Physics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningLecture- Tutorials for Introductory AstronomyPhysicsISBN:9780321820464Author:Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina BrissendenPublisher:Addison-WesleyCollege Physics: A Strategic Approach (4th Editio...PhysicsISBN:9780134609034Author:Randall D. Knight (Professor Emeritus), Brian Jones, Stuart FieldPublisher:PEARSON