Concept explainers
A body is subject to three forces;
Want to see the full answer?
Check out a sample textbook solutionChapter 12 Solutions
Essential University Physics: Volume 1 (3rd Edition)
Additional Science Textbook Solutions
An Introduction to Thermal Physics
Introduction to Electrodynamics
College Physics (10th Edition)
Physics for Scientists and Engineers with Modern Physics
University Physics with Modern Physics (14th Edition)
Conceptual Physical Science (6th Edition)
- If v×w =2i −3j+2k, v×w=2i−3j+2k, and v⋅w=5, and θ is the angle between v and w, thenarrow_forwardA body with mass 0.40 kg moves in one dimension according to a potential of theform U(x) = A/x3-B/x , where A = 4.0 Jm3 abd B = 3.0 Jm, and we take x > 0. (a) Sketch the form of the potential.(b) Find the force F resulting from this potential as a function of position x.(c) Find the equilibrium position(s) and determine whether they are stable or unstable.(d) If the speed of the body at x = 4.0m is v = 3.9 ms−1, what is the speed atx = 1.5 m?(e) Explain briefly what type(s) of motion are possible in this potential if the totalenergy E = 3.0 Jarrow_forwardAt a family picnic you are appointed to push your obnoxious cousin Throckmorton in a swing . His weight is w, the length of the chains is R, and you push Throcky until the chains make an angle u0 with the vertical. To do this, you exert a varying horizontal force F S that starts at zero and gradually increases just enough that Throcky and the swing move very slowly and remain very nearly in equilibrium throughout the process. (a) What is the total work done on Throcky by all forces? (b) What is the work done by the tension T in the chains? (c) What is the work you do by exerting force F ? (Ignore the weight of the chains and seat.)arrow_forward
- Find the work done by the force field F(x, y) x + i (y +2 ) j in moving an object along an arch of the cycloid r(t) (t- sin t ) i 1 cos t j 0 <t< 2piarrow_forwardA package is at rest on a conveyor belt which is initially at rest. The belt is started and moves to the right for 1.3 s with a constant acceleration of 2 m/s?. Knowing that the coefficients of Coulomb friction between the package and the belt are 4, = 0.35 and µ = 0.25, determine: (a) whether the package slides during that 1.3s time interval; and (b) the work of the friction force on the package during that 1.3s interval.arrow_forwardA brick of mass m is initially at rest at the peak of an inclined plane which has a height of 5.52m and has an angle of θ=20.3∘ with respect to the horizontal. After it has been released, it is found to be traveling at v=0.84m/s a distance d after the end of the inclined plane, as shown. The coefficient of kinetic friction between the brick and the plane is μp=0.1, and the coefficient of friction on the horizontal surface is μr=0.2. What is the speed of the brick, in meters per second, just after it leaves the inclined plane? Find the distance, d, in meters.arrow_forward
- A block of weight w = 40.0 N sits on a frictionless inclined plane, which makes an angle θ = 24.0∘ with respect to the horizontal, as shown in the figure. (Figure 1) A force of magnitude F = 16.3 N , applied parallel to the incline, is just sufficient to pull the block up the plane at constant speed.arrow_forwardQ1. (a) A 15 m long light beam is supported at A and B at two ends. Loads of 60 N and 40 N are applied vertically at distances of 12 m and 6 m from point B respectively as. shown below. Calculate the reactions at A and B. A RA 3 m 60 N 6 m 40 N 35⁰ 6 m B (b) A ball of mass 4 kg is hung by an inelastic string from the ceiling. A horizontal force applied to the ball such that the string deflected with an angle 35° from the vertical. Find the magnitude of the force and the tension in the string. (i) Find the acceleration of the block. (ii) Find the displacement after 8 seconds. RB 4 kg (c) A wooden block of mass 2 kg lying on a horizontal floor is pulled by a horizontal force of 30 N. The coefficient of friction between the block and the floor is 0.3.arrow_forward*14-64. The block has a weight of 80 lb and rests on the floor for which u = 0.4. If the motor draws in the cable at a constant rate of 6 ft/s, determine the output of the motor at the instant 0 = 30°. Neglect the mass of the cable and pulleys. 3 ft 3 ft ,6 ft/sarrow_forward
- The potential energy of a system of two particles separated by a distance r is given by U(r) = A/r, where A is a constant. Find the radial force F→r that each particle exerts on the other.arrow_forwardA particle of mass m = 1.50 kg moves along one dimension and is subject to a single force, whose potential energy function is given by U(x) = x4 – 2x2 + 4 (where U is measured in Joules and x is measured in meters). At the moment when the particle is located at position x = 1.50 m, its speed is v = 2.50 m/s. %3Darrow_forwardA warehouse worker is pushing a 90.0 kg crate with a horizontal force of 291 N at a speed of v = 0.845 m/s across the warehouse floor. He encounters a rough horizontal section of the floor that is 0.75 m long and where the coefficient of kinetic friction between the crate and floor is 0.356. (a) Determine the magnitude and direction of the net force acting on the crate while it is pushed over the rough section of the floor. (b) Determine the net work done on the crate while it is pushed over the rough section of the floor. (c) Find the speed of the crate when it reaches the end of the rough surface.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