3) Gate AB is 3.20 m long. Find the horizontal force H to hold the gate in equilibrium. (Width of AB is 2.0m). ANS: H = 24.50 kN 60 cm 2m Oil (80.80) Water A B H

Problem 2. The unstretched length of springs AB and AC are 0.8485 m and 3 m, respectively. The weight of the box is 84 N. The system is in equilibrium and the springs are stretched, find the following: a) Force in spring AB b) Force in spring AC c) Resultant force of the system d) Direction of resultant from the horizontal

The spring is placed between the wall and the 11.5-kg block. If the block is subjected to a force of F = 570 N, determine its velocity in m/s when s = 0.5 m. When s = 0, the block is at rest and the spring is uncompressed. The contact surface is smooth. k = 510 N/m %D k :

2 kip/ft 6 in 10 in B 16 in E• D• 40 kip 16 in 5 ft 5 ft 10 ft- The simply-supported beam-column above is subjected to a uniformly distributed load and an axial load, as shown. Assume that the internal resultants on the cross-section passing through point E are as follows: ND = -40 kip VD = 10 kip MD = +75 kip-ft Which of the following is closest to the longitudinal normal stress at point E? O +1.44 ksi -78.1 psi -284 psi O+128 psi