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A body is subject to three forces;
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Chapter 12 Solutions
Essential University Physics (3rd Edition)
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- Find the work done by the force field F=(2x^2+2y^2)i+(3x+3y)j as an object moves counterclockwise along the circle x^2+y^2=4 from (2,0) to (−2,0) and then back to (2,0) along the x-axis.arrow_forwardB3arrow_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_forward
- Suppose a force field is given by F=(2x-y+z)i+(x+y z^{2}) } +(3x-2y+4z)k Find the work done in moving a particle once around a circle C in the xy-plane with its center at the origin and a radius of 3arrow_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_forwardA particle moves in the xy plane from the origin to a point having coordinates x=7 m and y=4 m under the influence of a force given by F= -2y^2i -2xj.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_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 collar of 5 kg mass shown in the figuremoves on a parabolic bar on a horizontal plane.The collar has a speed of 8 m/sec when it is atpoint B. Determine the friction force betweenthe collar and the bar if the coefficient offriction is 0.25. Formula of the parabolic bar isshown in the figure.arrow_forwardThe 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 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
- Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningClassical Dynamics of Particles and SystemsPhysicsISBN:9780534408961Author:Stephen T. Thornton, Jerry B. MarionPublisher:Cengage LearningPhysics for Scientists and Engineers with Modern ...PhysicsISBN:9781337553292Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
- Physics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
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