Body U with mass 5m is stacked on the top body W with mass m, and released. The bodies are in contact along the frictionless interface at 45 to the vertical. The body U is in contact with the frictionless vertical wall. Body W lies on the floor with coefficient of friction u. Relevant dimensions are shown in the figure. Express the results in terms of given quantities: m, g, h and u (except when u is given numerically). h U: 5m C You need not evaluate sin 45° = cos 45° = 2/2. 45 Draw the free body diagrams for the two bodies. D W: m 2). Find the critical coefficient of friction . (i.e., 3h the minimal coefficient friction to prevent sliding). Let u< Me. The system moves. Write the condition that the velocities of U and W must satisfy for the two bodies to remain in contact.

Body U with mass 5m is stacked on the top body W with mass m, and released. The bodies are in contact along the frictionless interface at 45 to the vertical. The body U is in contact with the frictionless vertical wall. Body W lies on the floor with coefficient of friction u. Relevant dimensions are shown in the figure. Express the results in terms of given quantities: m, g, h and u (except when u is given numerically). h U: 5m C You need not evaluate sin 45° = cos 45° = 2/2. 45 Draw the free body diagrams for the two bodies. D W: m 2). Find the critical coefficient of friction . (i.e., 3h the minimal coefficient friction to prevent sliding). Let u< Me. The system moves. Write the condition that the velocities of U and W must satisfy for the two bodies to remain in contact.

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter7: Dry Friction

Section: Chapter Questions

Problem 7.49P

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