168-B CE Board Nov. 2009making an angle of 60' from the horizontal.and the floor and between the ladder ard thea honzontal floor at A and on the wall at BThe 10 m. ladder weighing 35 kg is resting onThe coefficient of friction between the ladderO Determine the distance x to which thecausing the ladder to slip at its lower end72 kg man can climb on the ladder withoutwall is 0.25.A.Determine the reaction at the wall at B.Determine the reaction at the horizontalfloor at A.Solution:O Distance "x" to which the 72 kg man canclimb on the ladder without causing theladder to slip at its lower end A.72kg3035 kg60NAFA10 m

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Answered: 168-B CE Board Nov. 2009 making an…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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If the motor exerts a constant force of 300 N on the cable, determine the speed ofthe 20-kg crate when it travels s = 10 m up the plane, starting from rest. The coefficient of kineticfriction between the crate and the plane is μk = 0.3. PWE
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1. The boom of the wall crane 4m long is held at right angles to the wall by a wire that is attached to the wall 3m above the foot of the boom. If the load lifted is 45000N, find the tension in the wire and the compression force in the boom Neglect the weight of the boom. Draw the FBD
A 180 lb man climbs at the middle of a 25 lb ladder leaned against the wall. The top portion of the ladder is 24 ft from the ground and its bottom is 6 ft from the wall. Assuming smooth wall and a stopper at the bottom of the ladder to prevent slipping, determine the reaction at the wall and at the bottom of the ladder. SHOW SOLUTION WITH FBD AND WRITE LEGIBLY
13.5 A 20lb collar C is moved from rest from the position A to the position B by cable CDE which passes around a pulley at D and is pulled downward by the constant force of 50lb at F as shown. Neglecting the effects of friction, determine the speed of the collar as it passes through B.
A one-storey building, idealized as a 12-ft-high frame with 2columns hinged at the base and a rigid beam, has a naturalperiod of 0.5 sec. Each column is an American standard wideflange steel section W8 x 18. Its properties for bending about itsmajor axis are Ix = 61.9 in4, S = Ix/c = 15.2 in3,E = 30,000 ksi. Neglect damping, determine the maximumresponse of this frame due to a rectangular pulse force ofamplitude 4 kips and duration td = 0.2 sec. The responsequantities of interest are displacement at the top of the frameand maximum bending stress in the columns.
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6. The steel gate 2.61m square of thickness 36.1mm is to be lifted by a frictionless pulley. The coefficient of friction between the dam and plate is 0.216 ,calculate the minimum force required to lift the gate if it is fully submerged to a depth of 1.61m. Use specific gravity of steel 8.0 PLEASE ANSWER THIS ASAP!!!
A hawser thrown from a ship to a pier is wrapped two full turns around a capstan. The tension inthe hawser is 7500 N; by exerting a force of 150 N on its free end, a dock worker can just keepthe hawser from sliding. (a) Determine the coefficient of friction between the hawser and thecapstan. (b) Determine the tension in the hawser that could be resisted by the 150 N force if thehawser were wrapped three full turns around the capstan.

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