A cargo ship is loading using a boom crane, which is a 15 m long pole with a cable for lifting cargo whichis suspended from the end of the pole. The boom is raised via a cable attached at a point that is 2/3 ofthe distance to the end of the pole. At one point the crane is lifting an 900 kg crate with the polemaking a 30 degree angle with the horizontal, while the cable makes a 40 degree angle with thehorizontal. Estimate the tension on the cable.

Given that:L=15mm=900kgTaking moment about point…

Answered: A cargo ship is loading using a boom…

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter5: Newton's Laws Of Motion

Section: Chapter Questions

Problem 76PQ: Jamal and Dayo are lifting a large chest, weighing 207 lb, by using the two rope handles attached to...

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Jamal and Dayo are lifting a large chest, weighing 207 lb, by using the two rope handles attached to either side. As they lift and hold it up so that it is motionless, each handle makes a different angle with respect to the vertical side of the chest (Fig. P5.76). If the angle between Jamals handle and the vertical side is 25.0 and the angle between Dayos handle and the vertical side of the chest is 30.0, what are the tensions in each handle? FIGURE P5.76
A uniform drawbridge must be held at a 37° angle abovethe horizontal to allow ships to pass underneath. The drawbridge weighs45,000 N and is 14.0 m long. A cable is connected 3.5 m from thehinge where the bridge pivots (measured along the bridge) and pullshorizontally on the bridge to hold it in place. What is the tension in the cable?
The walkway ABC of the footbridge is stiffened by adding the cable ADC and the short post of length L. If the tension in the cable is not to exceed 420 lb, what is the smallest value of L for which the 160-lb person can be supported at B?
A large wrecking ball is held in place by two light steel cables. If the massm of the wrecking ball is 4090 kg, what are (a) the tension TB in the cablethat makes an angle of 40° with the vertical, and (b) the tension TA in thehorizontal cable?
A professional athlete tears their Achilles tendon. There are two muscles in the back of the leg that pull upward on the Achilles tendon, as shown in the image below. (The Achilles tendon is the gray part above the heel) F₂ (250 N) F, (250 N) (a) Using information from the image above, what is the magnitude of the total force on the Achilles tendon? Number (b) What is the direction of the force on the Achilles tendon in the image? Up Down Left 20% 20° Right
The drawing shows a per- son (weight, W = 584 N) doing push-ups. Find the normal force exerted by the floor on each hand and each foot, assum- 12. ing that the person holds this position. 0.840 m 0.410 m
A vertical column supports a body having a mass of6 Mg (or 6 tonnes). Calculate the approximate valueof the upward force in kN exerted by the column.
A rectangular plate is supported by three cables as shown. Knowing that the tension in cable AD is 332 N, determine the weight (N) of the plate
What is the tension force present on the string attached to the ceiling making an angle of 34° if a 65kg box is hang on both of its corners, considering that the other end is attached to the wall horizontally?
To facilitate shifting the position of a lifting hook when it is not under load, the sliding hanger shown is used. The projections at A and B engage the flanges of a box beam when a load is supported, and the hook projects through a horizontal slot in the beam. The connections at A and B are smooth. Compute the magnitudes of the forces at A and B when the hook supports a 200-kg mass Assumem - 200 kg, a-280 mm, b-415 mm. Answers: a N N
An inextensible cable of negligible mass is used to drag a log on a roughhorizontal surface. The tension in the cable is 850 N and it acts at an angle of 35°to the horizontal. The log is dragged over a distance of 45m. The frictional forceexperienced by the log is 150 N. Calculate the net force acting on the log.
A loading car is at rest on a track forming an angle of25o with the vertical. The gross weight of the car andits load is 5500 lb, and it acts at a point 30 in. from thetrack, halfway between the two axles. The car is heldby a cable 24 in. from the track. Determine the tensionin the cable and the reaction at each pair of wheels.

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