HW3

52 Chapter 2 Force Systems 2/57 When making a left turn, a driver exerts two 1.5-lb forces on a steering wheel as shown. Determine the moment associated with these forces. Discuss the ef- fects of varying the steering-wheel diameter d. Ans. M 24 lb-in. CCW 1.5 lb 35° Ans a 1.5 lb d = 16"

attention in order to not make mistakes. (Rest of the infomation from Question 11 info.PNG) Please look at the pictures for info about the question

The weight of a 20 lb oven door acts vertically through point D. The door is supported by a hinge at point A and two springs are symmetrically located on each side of the door. The resultant moment about point A of the weight and spring forces is zero. NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. 8 in. 12 in. 5 in. -10 in.- = Based on the values of Fobtained for a 45° and a 90°, determine the stiffness of the springs. (Round the final answer to four decimal places.) The stiffness of the springs is [ lb/in.

Find the moment (Nm) caused by the force F = 697 N about point D if a= 27 mm and b= 34 mm. Round off only on the final answer expressed in 3 decimals. Note: answers maybe a positive or negative value, following the sign convention discussed on lectures.

Given a 2-D force system with geometry as shown.  Find the magnitude of the equivalent couple moment (Nm) acting at O if P = 532 N ,  Q = 306 N,   and  T = 483 N . Round off only on the final answer expressed in 3 decimal places. Instead of units, indicate the direction of moment: use CW if clockwise , CCW if counterclockwise.

52 Chapter 2 Force Systems 2/57 When making a left turn, a driver exerts two 1.5-1lb forces on a steering wheel as shown. Determine the moment associaled with these forces. Discuss the ef- fects of varying the steering-wheel diameter d. Ans. M = 24 lb-in. CCW 1.5 lb 35° 1.5 lb Ans n atit d = 16"-

Pravinbhai

! Required information NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Two forces P and Q are applied as shown at point A of a hook support. ट A 20°i 35⁰ Knowing that P = 75 N and Q = 125 N, determine graphically the magnitude and direction of their resultant using the parallelogram law. The magnitude of the resultant is N. The direction of the resultant considering OO' as the reference axis is

2. A person's arm is used for ergonomic studies. If the distance of the AB, BC, and CD segments are 35.0 mm, 28.0 mm, and 19.0 mm, respectively, and the model is holding a small 1.5-lb load on the distal metacarpals of her hand . Determine the magnitude and direction of the moment of force with respect to a) to the shoulder joint, b) to the olecranon joint, c) to the carpal joint.

F1 F2 a F3 A d C. F4 Consider the following values: - F5 a 25 m; b = 5 m; c = 25 m; d 5 m; F1 = 5 kN; F2 = 6 kN; F3 = 7 kN; F4 = 8 kN; F5 = 9 kN; a = 30° 0 = 60° B = 30° 1] What is the resultant moment of the five forces acting on the rod about point A? a) - 78.4 kN.m b) 82.7 kN.m c) - 54.6 kN.m d) 92.9 kN.m e) 24.1 kN.m f) - 47.1 kN.m 2] What is the resultant moment of the five forces acting on the rod about point B? a) 8.8 kN.m b) - 201.6 kN.m c) 131.6 kN.m d) - 128.9 kN.m e) 215.4 kN.m f) - 144.2 kN.m 3] What is the resultant moment of the five forces acting on the rod about point C? a) - 186.7 kN.m b) 211.1 kN.m c) -209.1 kN.m d) 127.9 kN.m e) -174.1 kN.m f) 35.3 kN.m 4] What is the resultant moment of the five forces acting on the rod about point D? a) - 217.8 kN.m b) 82.7 kN.m c) 121.9 kN.m d) – 200.7 kN.m e) 227.1 kN.m f) - 300.1 kN.m 5] What is the moment of the force F2 about point E? a) 191.7 kN.m b) - 228.1 kN.m c) 294.6 kN.m d) 93.1 kN.m e) 118.9 kN.m f) 321.3 kN.m

1) Determine the MAGNITUDE (absolute value) of the horizontal component of the reaction force at the pin connection A in Newtons 2) Determine the MAGNITUDE (absolute value) of the vertical component of the reaction force at the pin connection A in Newtons 3) Determine the MAGNITUDE (absolute value) of the vertical component of the reaction force at the roller B in Newtons

PROBLEMS 1 - Find the distance ( Y) if the moment of the forces system shown in fig. is equal to ( 12750 N.m) about the point (0) 500 N 70 m 30 ° 120 N 2- The moment of a certain force (F) is ( 180 N.m ) clockwise about (0 ) and ( 90 N. m ) counterclockwise about ( B), if it's moment about (A) is zero , Determine the force ? 3 m B 6 m 6N 3 - Forces of ( 4 N & 6 N) act on the lamina ABCD as shown in fig . Find the total moments of these forces about the point ( O). D 3m 5m 4N 250 N 15 4 - Calculate the moment of the ( 300 N) force on the handle of the monkey wrench about the center of the bolt. 200 mm 30 mm F=60 N 5 - A force F of magnitude 60 N is applied to the gear Determine the moment of F about point o. T100 m

Question #1: The radius of the two pulleys shown below is 1-ft. Other dimensions are as shown. Show that the moment due to the 50 lb tension in the rope is 355 ft-lb at any point in the system. 30°- B. 3 ft 50 lb 50 lb -30° 4 ft A 3 ft 2 ft