Concept explainers
SSM A block of mass mt = 4.0 kg is put on top of a block of mass mb = 5.0 kg. To cause the top block to slip on the bottom one while the bottom one is held fixed, a horizontal force of at least 12 N must be applied to the top block. The assembly of blocks is now placed on a horizontal, frictionless table (Fig. 6-47). Find the magnitudes of (a) the maximum horizontal force
Figure 6-47 Problem 61.
Want to see the full answer?
Check out a sample textbook solutionChapter 6 Solutions
Fundamentals of Physics Extended
Additional Science Textbook Solutions
Campbell Biology (11th Edition)
Physics for Scientists and Engineers: A Strategic Approach, Vol. 1 (Chs 1-21) (4th Edition)
College Physics: A Strategic Approach (3rd Edition)
Human Biology: Concepts and Current Issues (8th Edition)
Living By Chemistry: First Edition Textbook
Biology: Life on Earth (11th Edition)
- The coefficient of static friction between a block of mass m and an incline is = 0•3. (a) What can be the maximum angle e of the incline with the horizontal so that the block does not slip on the plane ? (b) If the incline makes an angle 8/2 with the horizontal, find the frictional force on the block.arrow_forwardA loaded penguin sled weighing80 N rests on a plane inclined atangle u 20 to the horizontal (Fig.6-23). Between the sled and theplane, the coefficient of staticfriction is 0.25, and the coefficient ofkinetic friction is 0.15. (a) What isthe least magnitude of the forceparallel to the plane, that will preventthe sled from slipping down the plane? (b) What is the minimummagnitude F that will start the sled moving up the plane? (c)What value of F is required tomove the sled up the plane at constantvelocity?arrow_forward88 In Fig. 6-59, block 1 of mass m = 2.0 kg and block 2 of mass m2 = 1.0 kg are connected by a string of negligible mass. Block 2 is pushed by force F of magnitude 20 N and angle 0= 35°.The coef- %3D %3D %3D ficient of kinetic friction between each block and the horizontal surface is 0.20. What is the tension in the string? Fig. 6-59 Problem 88.arrow_forward
- A particle of mass 0.5 kg is at rest on a rough plane inclined at an angle to the horizontal where sin = 3/5. The particle is just prevented fromsliding from the plane by a force of 2 N applied in an upward directionparallel to a line of the greatest slope of the plane.(a) Draw a figure showing all the forces acting on the particle. (b) Calculate the coefficient of friction between the particle and theplane.(c) Calculate by how much the force of 2 N must be increased so thatthe particle is about to move up the plane.arrow_forward15-6. A train consists of a 50-Mg engine and three cars, each having a mass of 30 Mg. If it takes 80 s for the train to increase its speed uniformly to 40 km/h, starting from rest, determine the force T developed at the coupling between the engine E and the first car A. The wheels of the engine provide a resultant frictional tractive force F which gives the train forward motion, whereas the car wheels roll freely. Also, determine F acting on the engine wheels.arrow_forwardA large box of mass 11.4 kg sits on a ramp that makes an angle of 30.1 degrees with the horizontal. The surface of the ramp is rough and the coefficients of static and kinetic friction are given as 0.56 and 0,38, respectively. We exert a force up the ramp (parallel to the ramp surface) so that the box does not move. Calculate the maximum and the minimum magnitude of the force we can exert so that the box does not move. Enter the difference between the maximum and the minimum force values here: Fmax-Fmin (in Newtons). On your paper, show all the forces on free-body diagrams, clearly show your work, your derivation and calculations. Make sure to include your physics-based reasoning.arrow_forward
- The coefficient of static friction µg between the 83-lb body and the 14° wedge is 0.37. Determine the magnitude of the force P required to begin raising the 83-lb body if (a) rollers of negligible friction are present under the wedge, as illustrated, and (b) the rollers are removed and the coefficient of static friction Hs = 0.37 applies at this surface as well. 83 lb 14° Answers: (a) P = i Ib (b) P = i Ibarrow_forward(b) The coefficient of kinetic friction between a 40 kg crate and the ware- house floor is 70% of the corresponding coefficient of static friction. The crate falls off a forklift that is moving at 3 m/s and then slides along the warehouse floor for a distance of 2.5 m before coming to rest. What is the coefficient of static friction between the crate and the floor?arrow_forward4-54. The spool has a mass of 200 kg and rests against the wall and on the floor. If the coefficient of static friction at B is (4)e = 0.3, the coefficient of kinetic friction is (He)B = 0.2, and the wall is smooth, determine the friction force developed at B when the vertical force applied to the cable is P= 80 N. 0.4 m 0.1 marrow_forward
- QUESTION 12 A person pushes a crate of mass 48 kg upa ramp at angle 26 with the horizontal. The coeficient of static friction along the ramp is 0.45, and the coefficient of kinetic triction along the ramp is 0.3. To move the crate up with constant speed, with what magnitude of force in newtons (N must the person push? QUESTION 11 A man puls a crate of mass 24 kg with a force of 56 N at an angle 30 with respect to the horizontal. Calculate the normal force on the crate, in the unit newton (N 30arrow_forward•9 0 A 3.5 kg block is pushed along a horizontal floor by a force F of magnitude 15 N at an angle e = 40° with the horizontal (Fig. 6-19). The coefficient of ki- netic friction between the block Flg. 6-19 Problems 9 and 32. and the floor is 0.25. Calculate the magnitudes of (a) the frictional force on the block from the floor and (b) the block's accelération. •10 Figuré 6-20 shows an initially. stationary block of mass m on a floor. A force of magnitude 0.500mg is then applied at upward angle e= 20°. What is the magni- tude of the acceleration of the Flg. 6-20 Problem 10. www. block across the floor if the friction coefficients are (a) u, = 0.600 and u = 0.500 and (b) , = 0.400 and 4 0.300?arrow_forward1) A force of magnitude 31 N pushes from the left on a horizontally stacked set of blocks made of the same material on a rough surface with masses from left to right m1 = 1kg, m2 = 2.0kg, and m3 = 3.0kg. The coefficient of kinetic friction between the blocks and the surface is μk = 0.17 (a) What is the acceleration of the stack? (b) What is the force exerted by m1 on m2? (c) What is the force exerted by m2 on m3?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