Chapter 11, Problem 34P

Determine the tension in each cable necessary for equilibrium of the massless pipe supporting 800 N/m uniform load over a distance of 3 m if the support at A is ball- and-socket. Note that the structure is symmetrical about the x-z plane. X 1.5 m 800 N/m 3 m B 1 m 1.5 m -1.5m1m Z 1.5 m 3 m

Determine the ratio P/Q of the forces that are required to maintain equilibrium of the mechanism for an arbitrary angle 0. Neglect the weight of the mechanism.

Q4/ The jib crane is supported by a pin at C and rod AB. If the load has a mass of 3 Mg with its center of mass located at G, determine the horizontal and vertical components of reaction at the pin C and the force developed in rod AB on the crane when x = 6 m. 4 m A B 3.2 m 0.2 m D

B5

1. The cord AB has a length of 5 m and is attached to the end B of the spring having a stiffness k = 10 N/m. The other end of the spring is attached to a roller C so that the spring remains horizontal as it stretches. If a 10 N weight is suspended from B, determine the necessary un-stretched length of the spring, so that = 40° for equilibrium. 5 m 5 m 5 m- www k = 10 N/m

Spring CD remains in the horizontal position at all times due to the roller at D. If the spring is unstretched when 0 = 0° and the stiffness is k = 1.5 kN/m, determine the smallest angle for equilibrium and the horizontal and vertical components of reaction at pin А. 0.45 m 0.6 m B F= 300 N A

Determine the magnitude of the force P required to hold the 300-kg crate in equilibrium

The smooth disks D and E have a weight of 220 lb and 100 lb, respectively. If a horizontal force of P = 220 lb is applied to the center of disk E, determine the normal reactions at the points of contact with the ground at A, B, and C.

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