1 Introduction To Statics 2 Basic Operations With Force Systems 3 Resultants Of Force Systems 4 Coplanar Equilibrium Analysis 5 Three-dimensional Equilibrium 6 Beams And Cables 7 Dry Friction 8 Centroids And Distributed Loads 9 Moments And Products Of Inertia Of Areas 10 Virtual Work And Potential Energy Chapter10: Virtual Work And Potential Energy
Chapter Questions Section: Chapter Questions
Problem 10.1P: Determine the number of DOF for each of the mechanisms shown. Problem 10.2P: The uniform bar of weight W is held in equilibrium by the couple C0. Find C0 in terms of W, L, and . Problem 10.3P: Bars AB and AC of the mechanism are homogenous with each of weight W. Determine the fame P required... Problem 10.4P: The weight of each homogeneous bar of the linkage is W. Determine the horizontal force F required to... Problem 10.5P: The 1800-kg boat is suspended from two parallel cables of equal length. The location of the center... Problem 10.6P: The 2.4-kg lamp, with center of gravity located at G, is supported by the parallelogram linkage of... Problem 10.7P: The linkage is made of two homogenous bars of weights shown in the figure. Determine the horizontal... Problem 10.8P: For the frame shown, find the horizontal component of the support reaction at B. Neglect the weights... Problem 10.9P: The four-bar linkage supports the homogeneous box of weight W. Neglecting the weight of the linkage,... Problem 10.10P Problem 10.11P: Determine the ratio P/Q of the forces that are required to maintain equilibrium of the mechanism for... Problem 10.12P: Find the vertical force P that will hold the linkage in the position =40. The spring of stiffness... Problem 10.13P: The linkage of the braking system consists of the pedal arm DAB, the connecting rod BC, and the... Problem 10.14P: The automatic drilling robot must sustain a thrust of 32 lb at the tip of the drill bit. Determine... Problem 10.15P: Determine the couple C for which the mechanism would be in equilibrium in the position =25. Neglect... Problem 10.16P: The scissors jack is used to elevate the weight W. Determine the couple C necessary to support the... Problem 10.17P Problem 10.18P: Calculate the torque C0 that must be applied to the handle of the screw jack in order to lift the... Problem 10.19P: Determine the force F and the angle a required to hold the linkage in the position 1=60,=15. Each... Problem 10.20P: Locate the instant center of rotation of bar AB for each case shown. Problem 10.21P Problem 10.22P: Determine the force P that will keep the mechanism in equilibrium in the position shown. Problem 10.23P Problem 10.24P Problem 10.25P Problem 10.26P: Determine the ratio P/Q for which the linkage will be in equilibrium in the position shown. Neglect... Problem 10.27P Problem 10.28P Problem 10.29P: If the input force to the compound lever is P = 30 lb, calculate the output force Q. Problem 10.30P: Determine the roller reaction at F due to the applied force P = 60 lb. Problem 10.31P Problem 10.32P Problem 10.33P Problem 10.34P Problem 10.35P Problem 10.36P: For the pliers shown, determine the relationship between the magnitude of the applied forces P and... Problem 10.37P: When activated by the force P, the gripper cm a robots arm is able to pick up objects by applying... Problem 10.38P Problem 10.39P: The hinge is of the type used on some automobiles, in which the door DE appears to rotate about... Problem 10.40P: The spring attached to the sliding collar is capable of carrying tension and compression. The spring... Problem 10.41P: The weight W is suspended from end B of the weightless bar that is supported by walls at A and C.... Problem 10.42P: The uniform bar of weight W and length L = 1.8R rests in a hemispherical cavity of radius R.... Problem 10.43P: A slender homogeneous bar is bent into a right angle and placed on a cylindrical surface. Determine... Problem 10.44P: The body shown is a composite of a hemisphere and a cylinder, with both of uniform weight density .... Problem 10.45P Problem 10.46P: The uniform bar AB of weight W and length L is pinned to a sliding collar at A and to the sliding... Problem 10.47P: Uniform rods of weights W1 and W2 are welded to the two pulleys that are connected by a belt.... Problem 10.48P Problem 10.49P: The semi-cylinder of radius r is placed on a cylindrical surface of radius R. Assuming no slipping,... Problem 10.50P Problem 10.51P: The spring attached to the homogenous bar of weight W is undeformed when =0. Determine the smallest... Problem 10.52P: The spring is connected to a rope that passes over the cylindrical surface and is attached to corner... Problem 10.53P: Find the equilibrium positions of the 30-lb homogeneous bar and investigate their stability. Problem 10.54P: The mechanism of negligible weight supports the weight W. Find the value of for equilibrium. Is the... Problem 10.55P: Solve Prob. 10.54 assuming that A and B are connected by a spring of stiffness k = 0.3 W/b and free... Problem 10.56P: The stiffness of the ideal spring that is compressed by the slider C is k = 250 N/m. The spring is... Problem 10.57P: Find the stable equilibrium position of the system described in Prob. 10.56 if m = 2.06 kg. Problem 10.58P: The uniform bar AB of weight W = kL is in equilibrium when =65. Find the value of for which the... Problem 10.59P: The weight of the uniform bar AB is W. The stiffness of the ideal spring attached to B is k, and the... Problem 10.60P: The weightless bars AB and CE, together with the 5-lb weight BE, form a parallelogram linkage. The... Problem 10.61P Problem 10.62P: The bar ABC is supported by three identical, ideal springs. Note that the springs are always... Problem 10.50P
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Transcribed Image Text: Determine whether the block shown is in equilibrium, and find the magnitude and direction of the
friction force when P= 400 N.
500 N
H = 0.30
Hk =0.25
P
20°{
Branch of science that deals with the stationary and moving bodies under the influence of forces.
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