7. A ladder of length 12 m leaning up against a wall makes a 50 degree angle with the ground. The top of the ladder has sliders so that it can slide up and down the wall. Therefore, consider the top of the ladder to be frictionless. The ladder has a weight of 189 N that acts at its center. Someone weighing Fg = 1000 N is 0.92 m vertically below B, but on the ladder. Another person is on the ground holding the ladder by pushing on it horizontally with a force F. If the coefficient of static friction is 0.32, find the horizontal force F that must be applied at a vertical height of 1.2 m to prevent the ladder from slipping. F 2 m 12 m 50⁰ Fg B .92 m

7. A ladder of length 12 m leaning up against a wall makes a 50 degree angle with the ground. The top of the ladder has sliders so that it can slide up and down the wall. Therefore, consider the top of the ladder to be frictionless. The ladder has a weight of 189 N that acts at its center. Someone weighing Fg = 1000 N is 0.92 m vertically below B, but on the ladder. Another person is on the ground holding the ladder by pushing on it horizontally with a force F. If the coefficient of static friction is 0.32, find the horizontal force F that must be applied at a vertical height of 1.2 m to prevent the ladder from slipping. F 2 m 12 m 50⁰ Fg B .92 m

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

See similar textbooks

Similar questions

A 1130-kg car is held in place by a light cable on a very smooth (frictionless) ramp as shown below. The cable makes an angle of 31.0° above the surface of the ramp, and the ramp is itself raised by 25.0° above the horizonal. a. Find the tension in the cable. b. How hard does the surface of the ramp push on the car? 31.0° 25.0° 02016 Pearson Education, Inc. Cable
The boom of the wall crane 4m long is held at right angles to the wall by a wire that is attached to the wall 3m above the foot of the boom. If the load lifted is 45000N, find the tension in the wire and the compression force in the boom Neglect the weight of the boom. May I also ask mam/sir for the Diagram and explanation?
A puck weighs 8 lb and rests on the center of the frictionless surface of the ramp supported in equilibrium by ropes AC and BC. Determine the normal force the ramp exerts on the puck as well as the tension in each of the two ropes. g Variable Value Values for dimensions on the figure are given in the following table. Note the figure may not be to scale. a b C d e f g9 36.0 in 45.0 in 13.5 in 27.7 in 45.0 in 18.0 in 35.0 in B The normal force acting on the puck is pounds The tension in rope AC is The tension in rope BC is C pounds pounds
A former student of mechanics wishes to weigh himself t has access only to a scale A with capacity limited to 110 lbs and a small 20- lb spring dynamometer B. With the rig shown he discovers that when he exerts a pull on the rope so that Bregisters 18 lb, the scale A reads 84 lb. What is his correct weight? Answer: Weight= lb
What is the single force R that will produce the same external effect on the bar ABCD as the two forces P and Q? At what point on the bar must this force be applied? Use the Principles discussed in Lesson 1 to solve. 1P = 160 lb 45 2 ft A 300 Q=80 lb 2 ft
Three boxes, A, B, and C, are placed on a frictionless surface as shown in the diagram below. B A If you push on box A with a force of 8.25 N, find the contact force (in N) between each pair of boxes. Here m, = 5.20 kg, m, = 4.05 kg, and m. = 1.50 kg. contact force between A and B contact force between B and C N
A string has a tension T = 5.3 Newtons and connects the two blocks of m1 =3.0 kg and m2 =11.7 kg. Find the value of force F in Newtons assuming the friction is negligible. (only numbers in the box)
Q2): Body A is weight 100 N and tied to a rigid wall using a steel cable and it is located on body B of weight 300 N which rest on a rough surface (coefficient of fraction is 0,3). If the fraction coefficient between body A and B is equal to 0.25 and the pulling force P= 600 N. calculate the tension force of the steel cable. A 530 37 B TTTTTT
5. A 390-kg block is resting on a 29 deg inclined plane with a coefficient of friction = 0.63. Find the required horizontal force P (kN) that is necessary to start the block UP the incline. ROUND OFF TO TWO DECIMAL PLACES.
A crate with dimensions l = 0.50 m and h = 0.75 m rests on a plane that is inclined by θ = 30◦ from thehorizontal. The crate is in equilibrium, but if the crate were too tall, it will fall over down the slope.Find the effective point of application of the normal force on the crate, i.e., where is the normal force actingon the crate, keeping the crate in equilibrium? Hint: choose the crate’s center of mass as the axis of rotation.