Question 2 A wooden block of mass 6 kg resting on a horizontal plane is pulled by force Q inclined 30° to the horizontal with respect to the positive x-axis. i. Draw a free body diagram for the block What is the minimum value of Q required to start sliding if u=0.3 and µ=0.35. Determine the value of maximum friction between the pair of surfaces Determine the value of kinetic friction ii. ii. iv.

Question 2 A wooden block of mass 6 kg resting on a horizontal plane is pulled by force Q inclined 30° to the horizontal with respect to the positive x-axis. i. Draw a free body diagram for the block What is the minimum value of Q required to start sliding if u=0.3 and µ=0.35. Determine the value of maximum friction between the pair of surfaces Determine the value of kinetic friction ii. ii. iv.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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consider the mass and pulley system in the attached file. mass m1 = 29 kg and mass m2 = 12kg. the angle of the inclined plane is given and the coefficient of kinetic friction between mass m2 and the inclined plane is uk = 0.12. assume the pulleys are massless and frictionless when mass m2 moves a distance 4.94 m up the ramp, how far downward does mass m1 move? d= ?
2 Your answer is partially correct. Try again. In the figure, a slab of mass m, = 40 kg rests on a frictionless floor, and a block of mass m, = 9 kg rests on top of the slab. Between block and slab, the coefficient of static friction is 0.60, and the coefficient of kinetic friction is 0.40. A horizontal force F of magnitude 102 N begins to pull directly on the block, as shown. In unit-vector notation, what are the resulting accelerations of (a) the block and (b) the slab? u = 0- (a) Number T-7.4 -7.4 Units m/s^2 (b) Number i+ Units m/s^2 -0.88 Click if you would like to Show Work for this question: Open Show Work SHOW HINT LINK TO TEXT LINK TO SAMPLE PROBLEM LINK TO SAMPLE PROBLEM VIDEO MINI-LECTURE 10:50 PM search ENG 4/4/2021 ond 111Pgup) pri sc DOUSE insert dele home break 13) 23 bac 3 5. 4 R.
A 8.0 m long ladder AB leans against a smooth wall making an angle of 70º with the floor. The ladder is uniform and has a mass of 40.0 kg.(a) Determine the forces exerted on the ladder by the floor and the wall (i.e. at A and B respectively).(b) Determine the minimum value of the coefficient of static friction to prevent the ladder from slipping.
In the figure below, block A (mass 12 kg) and block B (mass 5.0 kg) are in equilibrium, with angle 0 = 30°. If block A is on the verge of sliding, what is the coefficient of static friction between block A and the surface below it? 9. A A B
The 50 N homogeneous bar AB is suspended from a rope that runs over a small peg at C. The bar is kept in the position shown by the horizontal force P. Determine the smallest coefficient of static friction at C for which the bar will be at rest.
Problem 2 (6 points): Blocks A, B and C have weights 50 lb, 25 lb and 15 lb. Block A is tied to wall by a cable. Force P is applied to a cable tied to block B. Coefficient of static friction between blocks A and B is 0.3, between blocks B and C 0.359, between C and ground D is 0.32. a) State the cases of impending motion as the horizontal force P is applied to block B. b) Assuming one of the stated cases of impending motion, draw proper Free Body Diagrams for the assumed case of impending motion. Label the assumed case of impending motion. c) Determine the smallest force P needed to cause impending motion. Justify your answer. d) Determine tension in cable A, from your final answer for the force P. A B D
is 125 lb. The The weight of block A in Fig. weights of the lever and cylinder can be neglected, and the pin at D is frictionless. If the coefficient of friction is 0.50 at B and 0.30 for all other surfaces, determine the force P re- quired to cause impending motion of block A to the left. 50 Ib 5 in. 10 in. 3 in.
3.) Uniform box A has a weight of 40 Ib, and is leaning against box B as shown. Box B has a weight of WB. Friction coefficients between the various 20 in. (friction-less) X = 24 in. Y = 10 in. 30 deg. surfaces are as shown. 24 in. W = 40 Ib u-0.7 H= 0.4 a. Draw FBD's of box A and box B. b. Determine if the system is in static equilibrium. Note – Only check for sliding of A and B. N
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Question 3(a) The non uniform XYZ bar which weighs 155 kg has its centre of gravity G at a distance 4 m from X. This bar rests on a homogeneous crate P. The static coefficient of friction between the bar and the crate is 0.31 while the same between the crate and the floor is 0.22. Determine the mass of the lightest crate P (in kilograms) that can be used to support this non uniform bar in the position shown in Figure 3. The height of the crate is 4.32 m and the length of the bar is 8.59 m. 4 m 3 m - 1 m - Figure 3 Question 3(b) Take an example from everyday life where you can identify the application of the concepts we learn in the "Dry friction" module. Sketch this example and discuss about the effect of friction on that particular scenario. Sketch does not have to be drawn to a scale. (Description should be 250 words or less).
Q4.) The 12 kg block A and 10 kg block B are pinned to a rod having negligible mass and resting on horizontal surfaces. A horizontal force P is applied to the rod at end C increasing gradually from zero until motion first begins. a) If the coefficient of static friction between both blocks and each surface is μ = 0.45, determine the value for P at which point motion first begins and describe the motion that occurs in a few brief words. b) If the coefficient of static friction between both blocks and each surface is μ = 0.6, determine the value for P at which point motion first begins and describe the motion that occurs in a few brief words. (Hint: Consider drawing the system as one FBD for this analysis and treat each block as a particle with negligible dimensions) 100 mm 200 mm с Bo 10 kg 25° A 12 kg 12 kg