PEARSON ETEXT ENGINEERING MECH & STATS
15th Edition
ISBN: 9780137514724
Author: HIBBELER
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Textbook Question
Chapter 4, Problem 20P
The tower crane is used to hoist the 2-Mg load upward at constant velocity. The 1.5-Mg jib BD, 0.5-Mg jib BC, and 6-Mg counterweight C have centers of mass at G1, G2, and G3, respectively. Determine the resultant moment produced by the load and the weights of the tower crane jibs about point A and about point B.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
The tower crane is used to hoist the 2.1-Mg load upward at constant velocity.
The 1.3-Mg jib BD, 0.9-Mg jib BC, and 6.5-Mg counterweight C have centers of
mass at G1, G2, and G3, respectively. Determine the resultant moment in kN-m
produced by the load and the weights of the tower crane jibs about point B. ( in
kN.m and assume counterclock wise as positive, clockwise as negative)
4 m
9.5m
-7.5 m
G1
12.5 m
23 m
The railway crossing gate consists of the 100-kg gate arm having a center of mass at Ga and the 250-
kg counterweight having a center of mas at GW. Determine the magnitude and directional sense of
the resultant moment produced by the weights about point A.
G₁
2.5 m
0.75 m
+
Gw
0.5 m
0.25 m
1'm
Elements of the lower arm are shown in the figure.
The mass of the forearm is 2.3 kg with mass center
at G. Determine the combined moment about the
elbow pivot O of the weights of the forearm and the
3.6-kg homogeneous sphere. What must the biceps
tension force be so that the overall moment about O
is zero?
50 mm
55
150 mm
2.3(9.81) N
3.6(9.81) N
325 mm
Chapter 4 Solutions
PEARSON ETEXT ENGINEERING MECH & STATS
Ch. 4 - Determine the moment of the force about point O.Ch. 4 - Determine the moment of the force about point O.Ch. 4 - Determine the resultant moment produced by the...Ch. 4 - Determine the resultant moment produced by the...Ch. 4 - Determine the resultant moment produced by the...Ch. 4 - Determine the moment about point B of each of the...Ch. 4 - Determine the moment of each of the three forces...Ch. 4 - Determine the moment of each of the three forces...Ch. 4 - Determine the moment of each force about the bolt...Ch. 4 - Two men exert forces of F = 80 lb and P = 50 lb on...
Ch. 4 - Prob. 13PCh. 4 - In order to pull out the nail at B, the force F...Ch. 4 - The tower crane is used to hoist the 2-Mg load...Ch. 4 - The tower crane is used to hoist a 2-Mg load...Ch. 4 - Prob. 39PCh. 4 - Prob. 43PCh. 4 - Prob. 61PCh. 4 - Prob. 100PCh. 4 - Prob. 106PCh. 4 - Prob. 135PCh. 4 - Prob. 154PCh. 4 - Prob. 1RPCh. 4 - Replace the force F having a magnitude of F = 50...Ch. 4 - Prob. 3RPCh. 4 - Prob. 4RPCh. 4 - Prob. 5RPCh. 4 - Prob. 6RPCh. 4 - Prob. 7RPCh. 4 - Prob. 8RP
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
- To lift the table without tilting, the combined moment of the four parallel forces must be zero about the x-axis and the y-axis (O is the center of the table). Determine the magnitude of the force F and the distance d.arrow_forwardThe forces P and Q act on the handles of the wrench. If P = 321b and Q = 36 lb, determine the combined moment of the two forces about the z-axis.arrow_forwardDetermine the moment of the force F about point A in terms of F and d. Use (a) the scalar method; and (b) the vector method.arrow_forward
- The trapdoor is held in the horizontal plane by two wires. Replace the forces in the wires with an equivalent force R that passes through point A, and determine the y-coordinate of point A.arrow_forwardI Review Part A The tower crane is used to hoist the 2.3-Mg load upward at constant velocity. The 1.5-Mg jib BD, 0.4-Mg jib BC, and 6.2-Mg counterweight C have centers of mass at G1, G2, and G3, respectively. (Figure 1) Determine the resultant moment produced by the load and the weights of the tower crane jibs about point Á and about point B. Express your answers using three significant figures separated by a comma. vec MA MB Submit Previous Answers Request Answer x Incorrect; Try Again; 5 attempts remaining Figure Gy-15 m Gi 125 m 23 marrow_forwardThe figure below shows a man holding a box of mass 15 kg. Determine the moment produced by the weight of the box about point E. Given that d1=0.9 m, d2-D0.4 m and d3-1.5 m. di m - di m d2 m E d3 marrow_forward
- The pipe assembly is secured on the wall by the two brackets. If the flower pot has a weight of 80 lb, determine the magnitude of the moment produced by the weight about the OA axisarrow_forwardThe mass of the luggage carrier and the suitcase combined is 12 kg. Their weight acts at A. The sum of the moments about the origin of the coordinate system due to the weight acting at A and the vertical force F applied to the handle of the luggage carrier is zero. Determine the force F (a) if α = 30; (b) if α = 50arrow_forward2. The wheelbarrow and its contents have a center mass at G. If F= 140N and the resultant moment produced by force F and the weight about the axle at point A, is zero, determine the mass of the wheel barrow and its contents.arrow_forward
- The caster wheel is subjected to the two couples. Determine the forces F that the bearings exert on the shaft so that the resultant couple moment on the caster is zero.arrow_forwardThe 12-ft boom AB has a fixed end A. A steel cable is stretched from the free end B of the boom to a point C located on the vertical wall. If the tension in the cable is 380 lb, determine the moment about A of the force exerted by the cable at B.arrow_forwardThe tailgate of a car is supported by the hydraulic lift BC . If the lift exerts a 125-lb force directed along its centerline on the ball and socket at B , determine the moment of the force about A.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
How to balance a see saw using moments example problem; Author: Engineer4Free;https://www.youtube.com/watch?v=d7tX37j-iHU;License: Standard Youtube License