9. A 2.05-kg block is pushed against a wall with a force of magnitude P such that the block slides vertically down the wall at a constant speed. The force P is directed perpendicular to the wall and the coefficient of kinetic friction between the wood and the wall is p, = 0.265. 8 N k %3D (a) What is the direction of the friction force on the block by the wall? 1. Downward 2. Upward 3. Out of the wall 4. Into the wall ΣΕ T or (b) Determine the magnitude P of the pushing force. 75

9. A 2.05-kg block is pushed against a wall with a force of magnitude P such that the block slides vertically down the wall at a constant speed. The force P is directed perpendicular to the wall and the coefficient of kinetic friction between the wood and the wall is p, = 0.265. 8 N k %3D (a) What is the direction of the friction force on the block by the wall? 1. Downward 2. Upward 3. Out of the wall 4. Into the wall ΣΕ T or (b) Determine the magnitude P of the pushing force. 75

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter5: More Applications Of Newton’s Laws

Section: Chapter Questions

Problem 13P: Two blocks connected by a rope of negligible mass are being dragged by a horizontal force (Fig....

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Two boxes of fruit on a frictionless horizontal surface are connected by a light string as in Figure P4.85, where m1 = 10.0 kg and m2 = 20.0 kg. A force of 50.0 N is applied to the 20.0-kg box. (a) Determine the acceleration of each box and the tension in the string. (b) Repeat the problem for the case where the coefficient of kinetic friction between each box and the surface is 0.10. Figure P4.85
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