Q2) Two strings are passed around the four 1-in.-diameter pegs that are attached to a board and pulled with the forces shown. (a) find the magnitude and direction of the resultant couple acting on the board. (b) If only the string that passed around pigs B and C is used, what is the minimum value of the tension required to create the same couple as in (a). 25 lb 35 lb B 6 in. 35 lb 8 in. 25 lb

Q2) Two strings are passed around the four 1-in.-diameter pegs that are attached to a board and pulled with the forces shown. (a) find the magnitude and direction of the resultant couple acting on the board. (b) If only the string that passed around pigs B and C is used, what is the minimum value of the tension required to create the same couple as in (a). 25 lb 35 lb B 6 in. 35 lb 8 in. 25 lb

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

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter2: Basic Operations With Force Systems

Section: Chapter Questions

Problem 2.80P: The figure shows one-half of a universal coupling known as the Hooke's joint. The coupling is acted...

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Q2) Two strings are passed around the four 1-in.-diameter pegs that are attached to a board and pulled with the forces shown. (a) find the magnitude and direction of the resultant couple acting on the board. (b) If only the string that passed around pigs B and C is used, what is the minimum value of the tension required to create the same couple as in (a). 25 lb 35 Ib 6 in. 35 lb 8 in. 25 lb
Difficult Problem: If magnitude of MA is 1200 kN – m and the distance between A and B is 3 m, what is the force FB and distance d so that the system shown at the right is equivalent to a force-couple system acting at point D, where the horizontal component of this force is R = 112 kN to the right and the corresponding couple is 635 counterclockwise. 60 kN 30 50 kN 2 m MA 60° 15° 200 kN m 100 kN 4 m Fs 2 m 200 kN 30 60 kN -3 m
Two strings are passed around the four 1-in.-diameter pegs that are attached to a board and pulled with the forces shown. (a) find the magnitude and direction of the resultant couple acting on the board. (b) If only the string that passed around pigs B and C is used, what is the minimum value of the tension required to create the same couple as in (a).
In the assembly shown, member AB is rigidly attached to the wall while an L bar is pinned to AB at E. Two forces P and Q are acting on the assembly as shown. Force P lies on the x-axis while force Q is applied at point D along a plane parallel to the yz plane. 1. Which of the following quantities is/are zero? (Choices: A. Moment of P about the x-axis ; B. Moment of P about the y-axis ; C. Moment of P about the z-axis) 2. Which of the following best approximates the moment of force Q about point A? 3. Which of the following best approximates the equivalent force-couple set at point A of the applied forces P and Q? Note: F is the resultant force and Cis the resultant couple4. Considering the force diagram of member DE, which gives the complete set of reactions for the support at E? (Note difference of Force and couple reactions)
200 lb 0 400 lb 3 ft 4 ft (a) 300 lb 2 ft 3 ft y For the loaded plate shown, four parallel forces are applied Three of the 4 forces are shown. The fourth force P and its line of action are unknown. The resultant of this force-couple system is only represented by the couple vector CR=-1100i + 1500j lb.ft. Determine the force P and its line of action. 1. Solve this problem algebraically by hand 2. Write a code to solve it arbitrarily. 3. Use part 2 to verify part 1. 4. In your submission include both just the code plus the "run" version of the code to show the results for P
A vertical force P at point A 3ft to the left of hinge support B of the lever beam and another vertical force F at B produce a resultant of 100Ib down at point D and a counterclockwise couple C of 200Ib-ft at the left-end of the beam 4ft from A. Find the magnitude and direction of forces P and F.
2. A vertical force P of 80 N is applied to the bell crank shown in the picture. a) Replace P with an equivalent force-couple system at B. b) Find the two vertical forces at C and D that are equivalent to the couple obtained in part (a).
4. Find the x-component and the y-component of the forces in 1200 Ib Frg. 2a
1. Three forces and an applied moment act on the beam with a fixed-end support. (a) Determine x and y components of each force (based on coordinate system drawn). (b) Draw FBD. (c) What motion does the fixed-end support restrict? (d) Solve for ALL the reactions at the support. m 1 m 0.3 m 0.5 4 kN m 1.5 m 70° 15 kN-m 10 kN 6 kN 0.3 m
.******** -5 in. A 30-Ib vertical force P is applied at A to the bracket shown., which is held by screws B and C. (a) Replace 2 in. P with an equivalent force-couple system at B. (b) B Find the two horizontal forces at B and C that are 3 in equivalent to the couple obtained in part a. ********* ******** *
Q2) Machine Curls and the Biceps Muscle. A woman performs seated machine curls to strengthen her biceps muscles (the figure below). She uses a weight of 10 kg. Horizontal distance between her elbows (A) and the bottom of the frictionless pulley (B) is 60 cm. Vertical distance between the same points is 20 cm. Determine the force exerted by the holding bar on the woman's hands when her arm is at 45° with the horizontal. At that moment, the weight has an upward acceleration of 3 m/s2. DB DA 32cm B 20cm AB 45 60cm
Q2) Machine Curls and the Biceps Muscle. A woman performs seated machine curls to strengthen her biceps muscles (the figure below). She uses a weight of 10 kg. Horizontal distance between her elbows (A) and the bottom of the frictionless pulley (B) is 60 cm. Vertical distance between the same points is 20 cm. Determine the force exerted by the holding bar on the woman's hands when her arm is at 45° with the horizontal. At that moment, the weight has an upward acceleration of 3 m/s2. 32cm DA 20cm AB 45° 60cm