20. A 5 kg block is pulled along a rough level surface by a pull force P, where P = 300 N. The figure shows the free-body diagram for the block, fk represents the force of kinetic friction. If the coefficient of kinetic friction between the block and the surface, k = 0.3, calculate the magnitude of the block's acceleration? Hint: Obtain two equations from Newton's second law, only one of them directly involve acceleration but you will still need the other equation. FN fko.? 3 5kg mg 300N olay ontos antiga P ΣFx = max= P_-4₁₂² = Max {Fy=may = FN-pg = mal FN-g=a el or sups P-MR₂ = m (FN Мк

20. A 5 kg block is pulled along a rough level surface by a pull force P, where P = 300 N. The figure shows the free-body diagram for the block, fk represents the force of kinetic friction. If the coefficient of kinetic friction between the block and the surface, k = 0.3, calculate the magnitude of the block's acceleration? Hint: Obtain two equations from Newton's second law, only one of them directly involve acceleration but you will still need the other equation. FN fko.? 3 5kg mg 300N olay ontos antiga P ΣFx = max= P_-4₁₂² = Max {Fy=may = FN-pg = mal FN-g=a el or sups P-MR₂ = m (FN Мк

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter5: Newton's Law Of Motion

Section: Chapter Questions

Problem 23P: While sliding a couch across a floor, Andrea and Jennifer exert forces FA and FJ on the couch....

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Check Your Understanding A block of mass 1.0 kg rests on a horizontal surface. The frictional coefficients for the block and surface are s=0.50and k=0.40 . (a) What is the minimum horizontal force required to move the block? (b) What is the block’s acceleration when this force is applied?
A 15-kg sled is pulled across a horizontal, snow-covered surface by a force appiled to a rope at 30 degrees with the horizontal. The coefficient of kinetic friction between the sled and the snow is 0.20. (a) If the force Is 33 N, what is the horizontal acceleration of the sled? (b) What must the force be in order to pull the sled at constant velocity?
Two blocks connected by a string are pulled across a horizontal surface by a force applied to one of the blocks, as shown below. The coefficient of kinetic friction between the blocks and the surface is 0.25. If each block has an acceleration of 2.0m/s2to the right, what is the magnitude Fof the applied force?
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Problem Two-block system is given below. The mass of block one is m 4 kg and the mass of block two is m, 8 kg. A force is applied on mg to start the motion of block two knowing that block 1 doesn't move. The coefficient of static friction for all surfaces is given as 04 (Take g-9.8 m/s) Tension force m. Fapplied a) Choose the corect answer for the following question How many forces along the x-axis are acting on block I with mass m? How many forces along the y-axis are acting on block I with mass m? How many torces along the x-axis are acting on block 2 with mass m? How many torces along the y axis are acting on block 2 with mass m? Calculate the magnimade of normal larce Filexerted by block 2 on block N. Caleulate the magnitude of the muximun atatte tretion farce Falorated berween bck I t oek
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