An escalator is driven by a chain connected to point A that supports a force F. The rollers at points A and B have frictionless bearings and ride in a loose-fitting track. If a person weighing 200 lb is being lifted at a steady speed and other weights may be neglected, determine the required chain force F and the reactions at the wheels at A and B. 12 in. 4 in. F 200 lb 9 in.

An escalator is driven by a chain connected to point A that supports a force F. The rollers at points A and B have frictionless bearings and ride in a loose-fitting track. If a person weighing 200 lb is being lifted at a steady speed and other weights may be neglected, determine the required chain force F and the reactions at the wheels at A and B. 12 in. 4 in. F 200 lb 9 in.

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter10: Virtual Work And Potential Energy

Section: Chapter Questions

Problem 10.62P: The bar ABC is supported by three identical, ideal springs. Note that the springs are always...

See similar textbooks

Similar questions

The uniform ladder of weight W is raised slowly by applying a vertical force P to the rope at A. Show that P is independent of the angle .
The homogeneous 240-lb bar is supported by a rough horizontal surface at A, a smooth vertical surface at B, and the cable BC. Draw the FBD of the bar and count the unknowns.
The homogeneous plate of weight W is supported by a ball-and-socket joint at D and three wires. Draw the FBD of the plate and count the unknowns.
The bar ABC is supported by three identical, ideal springs. Note that the springs are always vertical because the collars to which they are attached are free to slide on the horizontal rail. Find the angle at equilibrium if W = kL. Neglect the weight of the bar.
The block of weight W is pulled by the force P inclined at the angle to the horizontal. Find the smallest force P and the corresponding angle that would cause impending sliding of the block. The angle of static friction between the block and the ground is s.
Find the force P required to (a) push; and (b) pull the 80-lb homogeneous roller over the 3-in. curb.
The uniform 240-lb bar AB is held in the position shown by the cable AC. Compute the tension in the cable.
75 lb 10 in. 10 in. | Calculate reaction forces for pin A and roller B for five different values of a 12 im. (0
The level of a common steelyard without hook connections weights 7kg and acts at 5cm to the left of the fulcrum. The hook which carries the load,weights 4kg and is also attached on the left-hand side of the fulcrum at a distance of 12cm.if graduation mark 72cm from the fulcrum reads 50kg. Find (a).the weight of rider (b). How far is the zero graduation from fulcrum (c).What is the movement of riderper kg of graduation?
Problem 6 Compute the reaction forces in B and D. After solving the problem, answer the following question: "Is the force in D directed toward the right or direction? Does it make sense and why?" 8.4 kN f 8.4 kN D 2.8 m 4.5 m 4.5 m left
Required information NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. A 3300-lb forklift truck is used to lift a 1700-lb crate. A 16 in.24 in. 12 in. B Determine the reaction at each of the two front wheels A. (You must provide an answer before moving on to the next part.) The reaction at the front wheels A is lb.
L.A tractor of mass 1200 kg is used to lift gravel weighing 8 KN. Determine the reaction at each of the front wheel. 8 KN 500 mm 1000 mm 1250 mm 2. A fixed crane, as given in figure, has a mass of 1000 kg and is used to lift a 2400-kg crate. It is held in place by a pin at A and a roller at B. The center of gravity of the crane is located at G. Determine the components of the reactions at A and B. 2400 kg 15 i 4m 3. Determine whether the block shown is in equilibrium and find the magnitude and direction of the friction force when 0-25 and P-750N. 1200 N H, -0.35 H=0.25