Question P •C W The man in the diagram is trying to move a large box by pushing on it with a force, P. The box weighs W = 250 N and its centre of gravity is located in the centre of the box (point C). Given: The coefficient of static friction between the box and the floor is μs = 0.3 Dimensions: a = 1.8m, b=0.6m, h= 0.9 m We want to know whether the box will move if P = 70 N. Scenario: Box remains stationary First, let us consider the case of the box remaining stationary. Calculate the Friction force and Normal force under this condition. Then consider, how far from the centre line of the box does the normal force act. a. First, calculate the magnitude of the friction force (between box and floor) generated under Scenario. b. Calculate the magnitude of the normal force acting under the box. c. Calculate the location of the normal force - find its horizontal distance from box centre line.

Question P •C W The man in the diagram is trying to move a large box by pushing on it with a force, P. The box weighs W = 250 N and its centre of gravity is located in the centre of the box (point C). Given: The coefficient of static friction between the box and the floor is μs = 0.3 Dimensions: a = 1.8m, b=0.6m, h= 0.9 m We want to know whether the box will move if P = 70 N. Scenario: Box remains stationary First, let us consider the case of the box remaining stationary. Calculate the Friction force and Normal force under this condition. Then consider, how far from the centre line of the box does the normal force act. a. First, calculate the magnitude of the friction force (between box and floor) generated under Scenario. b. Calculate the magnitude of the normal force acting under the box. c. Calculate the location of the normal force - find its horizontal distance from box centre line.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

2.0 Block A weighs 500.0 N and block B weighs 280.0 N. Block A is held by a cord fastened to the wall. Force P is applied on B to drag it to the left at constant speed. The coefficient of friction between A and B is 0.300 and that between B and the floor is 0.320. Find the following : (a) the normal force exerted by A on B, FNA (b) the tension in the cord attached to A, T. (c) the frictional force exerted by B on A, fsB 60.0 20.00 A. B.
The 113-lb force P is applied to the 230-lb crate, which is stationary before the force is applied. Determine the magnitude and direction of the friction force F exerted by the horizontal surface on the crate. The friction force is positive if to the right, negative if to the left. Assume μs = P Answer: F = 0.48, Mk = 0.38. i Mk lb
The 75-lb force P is applied to the 160-lb crate, which is stationary before the force is applied. Determine the magnitude and direction of the friction force F exerted by the horizontal surface on the crate. The friction force is positive if to the right, negative if to the left. Assume μ = 0.50, μ = 0.38. P Answer: F= tel Hk lb
Consider two blocks that are supported on top of each other. The lower block has a mass m2 = 4, 8 kg and is supported on a table without friction. The upper block has a mass m1 = 2, 2 kg. Suppose the coefficient of static friction between the two blocks is given by μs = 0, 5. A force of magnitude F is applied as shown. What is Fmax, the maximum value of F for which the upper block can be
5. A rigid bar AB, 9 m long is suspended by two vertical rods at its end A and B and hangs in a horizontal position by its own weight. The rod at A is brass, length 3m, cross-sectional area is 1000 mm? and E̟ =1×10°N/ mm? . The rod at B is steel, length 5 m , cross-sectional area is 445 mm?. At what distance 'd' from A may a vertical load P=300ON be applied if the bar is to remain horizontal even after the load is applied? ve stred Steel 5m Brass 3m P = 3000N B 9m
A brass disk of radius 0.7 ftft and weight 459 lblb sits in a right-angle groove made of granite. The disk makes contact with the groove at AA and BB and the coefficient of static friction at both points are μS=μS= 0.39 A couple moment of MM is applied to the disk as shown.
The 79-lb force P is applied to the 200-lb crate, which is stationary before the force is applied. Determine the magnitude and direction of the friction force F exerted by the horizontal surface on the crate. The friction force is positive if to the right, negative if to the left. Assume μ = 0.42, μk = 0.34. P Answer: F= i Mk lb Attempts of 1 od
The spool of wire having a weight of 300 lb rests on the ground at B and against the wall at A. Determine the force P required to begin pulling the wire horizontally off the spool. The coefficient of static friction between thespool and its points of contact is μs = 0.25.
4. A nylon [E = 360 ksi; v= 0.4] rod (1) having a diameter of dl = 2.50 in. is placed inside a steel [E = 29,000 ksi] tube (2) as shown in Figure P3.7. The inside diameter of the steel tube is d2 = 2.52 in. An external load P is applied to the nylon rod, compressing it. At what value of P will the space between the nylon rod and the steel tube be closed? Nylon rod (1)- Steel tube (2)
To keep the box from sliding down the plane you applied a certain force P. The box weighs 490.50 N, and the static friction coefficient between the crate and the plane is ms = 0.25. Determine the value of force P. Answer = _N 175 O 155 135 O 150 165 170 30° O 140 O 160
The uniform bar AB weighing 240 lb is mounted as shown in the figure upon a carriage weighing 480 lb. The center of gravity of the carriage is at C midway between the wheels. If P = 180 lb and there is no frictional resistance at the wheels, find R, and R2, and also the horizontal and vertical components of the pin-pressure at A. Perfectly smooth W =240 lb| B 5' 5' 3 A P 1' C 2' R W= 480 lb R2
Dětérmine the magnitude of the force P, acting as shown, that will cause the 120 N crate to move. Assume the coefficient of static friction between the crate and the ground are ps = 0.3. 120N O 45 N O 50 N O 20 N O 36 N