Applied Statics and Strength of Materials (6th Edition)
6th Edition
ISBN: 9780133840544
Author: George F. Limbrunner, Craig D'Allaird, Leonard Spiegel
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 6, Problem 6.22P
The mean diameter of a square-threaded jackscrew is 1.80 in. The pitch of the thread is 0.40 in. and the coefficient of static friction is 0.20.
a. Calculate the force that must be applied at the end of an 18-in-long jack handle to raise a load of 5000 lb
b. Calculate the force required (it any) on the handle to start the load down
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
The root diameter of a triple threaded power screw is
550 mm It has a pitch of 10 mm It is used to
lift a load of 15 kN. The collar of the screw has an
outside diameter of 100 mm and an inner diameter 60
mm Find the force applied at a radius of 950 mm if the
coeffcient of friction for both threads and collar is 0.20.
A vertical two start square threaded screw of a (100 mm) pitch diameter and
(20 mm) pitch supports a vertical load of (18 kN). The axial thrust on the screw is taken by a
collar bearing of (87.5 mm) mean radius. Find the force required at the end of a lever which is
(400 mm) long in order to lift and lower the load. The coefficient of friction for the vertical
screw and nut is (0.15) and that for collar bearing is (0.2). Also, find the overall efficiency for
the two cases.
4.) A flat belt makes contact with an 18 in. diameter pulley through half its
circumference. If the coefficient of friction is 0.45, and a torque of 350 ft-lbs is to
be transmitted, calculate the belt tensions.
Chapter 6 Solutions
Applied Statics and Strength of Materials (6th Edition)
Ch. 6 - A 150 Ib block rests on a horizontal floor. The...Ch. 6 - A 200 lb block rests on a horizontal surface. The...Ch. 6 - A tool locker having a mass of 140 kg rests on a...Ch. 6 - A body weighing 100 lb rests on an inclined plane,...Ch. 6 - For Problem 6.4 , compute the friction force F...Ch. 6 - Block A in the figure shown has a mass of 10 kg...Ch. 6 - Compute the horizontal force P required to cause...Ch. 6 - Prob. 6.8PCh. 6 - Calculate the magnitude of the force P, acting as...Ch. 6 - For the block-and-wedge system shown in Figure...
Ch. 6 - Calculate the value of the horizontal force P...Ch. 6 - Two blocks, each having a mass of 100 kg and...Ch. 6 - Calculate the force P required to move the wedges...Ch. 6 - A heavy machine is lowered into a pit by means of...Ch. 6 - Calculate the maximum weight that the person in...Ch. 6 - A flat belt passes halfway around a...Ch. 6 - A belt-and-pulley arrangement has a maximum belt...Ch. 6 - Rework Problem 6.17 for a V-belt with a 40° groove...Ch. 6 - A mass of 320 kg is prevented from falling by a...Ch. 6 - A belt is wrapped around a pulley for 180°. The...Ch. 6 - A jackscrew has a square thread with a pitch of...Ch. 6 - The mean diameter of a square-threaded jackscrew...Ch. 6 - The woodworking vise shown is designed for a...Ch. 6 - A square-threaded screw is used ii a press, shown,...Ch. 6 - For the following computer problems, any...Ch. 6 - Prob. 6.26CPCh. 6 - For the following computer problems, any...Ch. 6 - 6.28 A horizontal force of 18 lb is required to...Ch. 6 - 6.29 A 90-Ib block lying on a rough horizontal...Ch. 6 - 6.30 The tool locker of Problem 6.3 is 0.8 m by...Ch. 6 - Prob. 6.31SPCh. 6 - A 50-lb block rests on a rough inclined plane. If...Ch. 6 - If in Problem 6-32 the plane has an inclination...Ch. 6 - A 325-lb block rests on a plane inclined 25° with...Ch. 6 - A 47 lb body is supported on a plane inclined 33°...Ch. 6 - Prob. 6.36SPCh. 6 - In the figure shown, block A weighs 200 lb and...Ch. 6 - Calculate the magnitude of the horizontal force P,...Ch. 6 - In the figure shown, the coefficient of static...Ch. 6 - A 500-lb block rests on a horizontal surface, as...Ch. 6 - A ladder, 8 m long and having a mass of 25 kg,...Ch. 6 - The ladder shown is supported by a horizontal...Ch. 6 - 6.43 A 16-ft ladder weighing 62 lb (assumed...Ch. 6 - Prob. 6.44SPCh. 6 - 6.45 Compute the minimum weight of block B that...Ch. 6 - Prob. 6.46SPCh. 6 - Prob. 6.47SPCh. 6 - Prob. 6.48SPCh. 6 - Prob. 6.49SPCh. 6 - Prob. 6.50SPCh. 6 - Calculate the force P necessary to start the block...Ch. 6 - A machine having a mass of 500 kg is to be raised...Ch. 6 - 6.53 A ship may exert an estimated pull of 8000 lb...Ch. 6 - A sailor wraps a heavy rope around a bollard (a...Ch. 6 - When a large rope is wrapped twice around a post,...Ch. 6 - A band brake is in contact with drum C through an...Ch. 6 - Prob. 6.57SPCh. 6 - The mean diameter of a square-threaded jackscrew...Ch. 6 - The manually operated apple cider press shown has...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- 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.arrow_forwardThe coeffient of static friction between the uniform bar AB of weight W and the ground is 0.45. Find the smallest angle and the corresponding force P that would initiate simultaneous tipping and sliding of the bar.arrow_forwardThe square-threaded screw with a pitch of 10 mm and a mean radius of 18 mm drives a gear that has a mean radius of 75 mm. The static and kinetic coefficients of friction between the gear and the screw are 0.12 and 0.06, respectively. The input torque applied to the screw is C0=10Nm. Assuming constant speed operation, determine the output torque C1 acting on the gear.arrow_forward
- The test specimen AB is placed in the grip of a tension-testing machine and secured with a wedge. The coefficient of static friction at both surfaces of the specimen is s. If the wedge angle is =18, determine the smallest s for which the grip is self-locking (no slipping takes place regardless of the magnitude of the force P). Neglect the weight of the wedge.arrow_forwardThe band wrench of Fig. an oil filter from a car. (The filter acts as if it were a wheel with a resisting torque of 40 lb ft.) Determine the mini- mum coefficient of friction between the band and the filter that will prevent slippage. The weight of the handle can be neglected. is used to unscrew 40 Ib-ft 2.5 in. -2 in. 7.5 in.arrow_forward4.) A flat belt makes contact with an 16 in. diameter pulley through half its circumference. If the coefficient of friction is 0.45 , and a torque of300ft−bsis to be transmitted, calculate the belt tensions. (please type answer not write by hend)arrow_forward
- Q1) The V thread of a screw jack has a single start with out side diameter 40 mm and 6 mm pitch. The angle of V is 55° and the load is carried on a swivel head of mean diameter 60 mm. the coefficient of friction between the nut and screw is 0.16 and that between the swivel head and the spindle is 0.1. Calculate the load required to be applied at the end of two levers each of effective length of 500 mm to raise an axial load of 1 KN and the efficiency of the lifting.arrow_forward3. A square threaded bolt of mean diameter 24 mm and pitch 5 mm is tightened by screwing a nut whose mean diameter of bearing surface is 50 mm. If the coefficient of friction for the nut and bolt is 0.1 and for the nut and bearing surfaces 0.16, find the force required at the end of a spanner 0.5 m long when the load on the bolt is 10 kN.arrow_forward2. A square threaded screw of mean diameter 25 mm and pitch of thread 6 mm is utilised to lift a weight of 10 kN by a horizontal force applied at the circumference of the screw. Find the magnitude of the [Ans. 966 N] force if the coefficient of friction between the nut and screw is 0.02. A bolt with a squore threaded screw has mean diameter of 25 mm and a nitch of 23 mm It carries anarrow_forward
- The following lead screw and saddle arrangement is used to lift aload of 550 kg. The square thread has a pitch of 3 mm and a diameter of 15 mm. The coefficient of friction is 0.2. Calculate the torque required to rotate the screw on raising and lowering.arrow_forwardi need the answer quicklyarrow_forwardA 30 KN of force at one end just supports a weight of 30,000 KN load at the other end. If the rope is run three times around a circular post, what is the coefficient of friction between the rope and the post?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
International Edition---engineering Mechanics: St...Mechanical EngineeringISBN:9781305501607Author:Andrew Pytel And Jaan KiusalaasPublisher:CENGAGE L
International Edition---engineering Mechanics: St...
Mechanical Engineering
ISBN:9781305501607
Author:Andrew Pytel And Jaan Kiusalaas
Publisher:CENGAGE L
EVERYTHING on Axial Loading Normal Stress in 10 MINUTES - Mechanics of Materials; Author: Less Boring Lectures;https://www.youtube.com/watch?v=jQ-fNqZWrNg;License: Standard YouTube License, CC-BY