The desk has a weight of 54 lb and a center of gravity at G. The coefficients of static and kinetic friction at A and B are μ = 0.5 and μ = 0.2, respectively. (Eigure 1) Figure -20-20- 201 < 1 of 1 > ▼ Determine the initial acceleration of a desk when the man applies enough force F to overcome the static friction at A and B. Express your answer to three significant figures and include the appropriate units. Enter positive value if the acceleration is to the right and negative value if the acceleration is to the left. ag = Submit Part B Value NA X Incorrect; Try Again; 5 attempts remaining Submit Previous Answers Request Answer Find the vertical reaction on each of the two legs at A. Express your answer to three significant figures and include the appropriate units. Units μÃ Value 4 ? Units Previous Answers Request Answer

The desk has a weight of 54 lb and a center of gravity at G. The coefficients of static and kinetic friction at A and B are μ = 0.5 and μ = 0.2, respectively. (Eigure 1) Figure -20-20- 201 < 1 of 1 > ▼ Determine the initial acceleration of a desk when the man applies enough force F to overcome the static friction at A and B. Express your answer to three significant figures and include the appropriate units. Enter positive value if the acceleration is to the right and negative value if the acceleration is to the left. ag = Submit Part B Value NA X Incorrect; Try Again; 5 attempts remaining Submit Previous Answers Request Answer Find the vertical reaction on each of the two legs at A. Express your answer to three significant figures and include the appropriate units. Units μÃ Value 4 ? Units Previous Answers Request Answer

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 7.81P: Calculate the horizontal force P required to push the 85-lb lawn mower at constant speed. The center...

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A box with mass m = 2.75 kg rests on the top of a table. The coefficient of static friction between the box and the table is μs = 0.71 and the coefficient of kinetic friction is μk = 0.34. Write an expression for Fm the minimum force required to produce movement of the box on the top of the table. Solve numerically for the magnitude of the force Fm in Newtons. Write an expression for a, the box's acceleration, after it begins moving. (Assume the minimum force, Fm, continues to be applied.) Solve numerically for the acceleration, a in m/s2.
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Question 6 The uniform solid cylinder shown in the figure is released from rest on the 0 = 60 degree incline and slips as it rolls down the incline. The cylinder has mass m = 10 kg and radius r = 0.45 m. The coefficient of friction between the cylinder and the incline is µ = 0.15. Take the acceleration due to gravity to be g = 9.81 m/s². link to image 0 (c) Calculate the following: (a) the normal reaction N between the cylinder and the incline; g (b) the linear acceleration a of the centre of mass of the cylinder; the angular acceleration a of the cylinder; X A Moving to another question will save this response. (d) the minimum coefficient of friction required to prevent the cylinder slipping down the incline. 截图和草截图已保存选择此处标