The force P is applied to the 50-kg block when it is atrest. Determine the magnitude and direction of thefriction force exerted by the surface on the block if(a) P = 0, (b) P = 200 N, and (c) P = 250 N. (d) Whatvalue of P is required to initiate motion up theincline? The coefficients of static and kinetic friction%3D%3Dbetween the block and the incline are µ, = 0.25 andHik = 0.20, respectively.P50 kg20°Hg = 0.25Hp = 0.2015°

Find: (a) Magnitude and direction of the friction of the friction force exerted by the surface on…

Answered: The force P is applied to the 50-kg…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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The homogeneous disk of mass m is resting on the right-angled supporting surfaces shown. The tension P in the cord is very gradually increased from zero. If the friction at both A and B is characterized by us = 0.23, what happens first - does the homogeneous disk slip in place or does it begin to roll up the incline? Determine the value of P at which this first movement occurs. Assume 0 = 25° B 0.75r/ Answer: P = i P Ө mg
A 10-lb force is pushing the 40-lb block as shown. The incline angle of the plane is α=40º . The coefficient of static friction between the block and the incline is μs = 0.75 and the coefficient of kinetic friction is μk = 0.65. Will the block slide on the plane? If it does, will it slide up or down the plane? What is the friction force between the block and the plane?
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The cross section of a quarter circular concrete block JKL as shown in Figure 5 is located at thebottom of a reservoir. The width (perpendicular to the paper) is 3 m. The specific weight of theconcrete block is 24 kN/m3. The coefficient of friction between the base of the block and thefoundation is 0.43. Determine if the concrete block is stable or not against sliding and overturningif the water is:A. At side XB. At side Y, with the same water level as A.
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a. Calculate the moment of inertia (I) of the given cross–section b. Calculate the first moment of area (Q) at certain depth by using 25 mm increments. c. Calculate and draw the horizontal shear stress distribution of the beam at 0.2 m from the left support
Problem 2: A solid circular shaft is acted upon by the torques as shown. If G= 12, 000 ksi determine: a. Rotation of wheel D with respect to A. b. Shear stress at point E Diameter of shaft: A-B = 2in C-D = 2in B-C = 4in T1=3 m in.kips T2=7 m in.kips Ta= 8.5 Tm in.kips T4= 4.5 m in.kips T1 T2
2. Show your complete solution.
k=2 lb/ft -¨¨¨¨¨ B Two blocks A and B have a weight of 11 lb and 6 lb, respectively. They are resting on the incline for which the coefficients of static friction are μA = 0.16 and μB = 0.23. Determine the angle 0 which will cause motion of one of the blocks. What is the friction force under each of the blocks when this occurs? The spring has a stiffness of k = 2 lb/ft and is originally unstretched. Determine the smallest angle which will cause motion of one of the blocks. Determine is the friction force under the block A at this angle. Determine is the friction force under the block Bat this angle.
The 12 kN crate is being pulled by the force P as shown in the figure. The force P makes an angle of e with the horizontal. a) Find the smallest possible force P to cause the crate to slide. b) Determine the angle e. c) Determine the horizontal frictional force acting at the bottom of the crate, W=12KN Note : The total surface R I Pmin - M= 0.20
Show Complete and clear solution with free body diagram.The 100-kg homogeneous smooth sphere rests on the 30 degrees incline A and bears against the smooth vertical wall B. Calculate the contact forces at A and B.
Dont forget to draw the FREE BODY DIAGRAMS ALSO PLEASE! (:

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