Schaum's Outline of College Physics, Twelfth Edition (Schaum's Outlines)
12th Edition
ISBN: 9781259587399
Author: Eugene Hecht
Publisher: McGraw-Hill Education
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 7, Problem 12SP
In Fig. 7-7, the 300-N load is balanced by a force F in both systems. Assuming efficiencies of 100 percent, how large is F in each system? Assume all ropes to be vertical.
Fig. 7-7
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
A cable with supports at the same elevation has a
span of 400 m. The cable supports a uniformly distrĂbuted
load of 6 kN/m along the horizontal. The maximum ten-
sion in the cable is 5000 kN. Determine
The sag in the cable at the middle of the span.
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. Don't forget to draw an illustration.
The wooden pile shown in the figure has a diameter of 105 mm and is subjected to a load of P - 90 kN. Along the length of the pile and
around its perimeter, soil supplies a constant frictional resistance of w- 3.85 kN/m. The length of the pile is L - 5.1m and its elastic
modulus is E - 13.0 GPa.
Calculate
(a) the force Fg needed at the base of the pile for equilibrium.
(b) the magnitude of the downward displacement at A relative to B.
Answers:
(a) Fs-
i
kN
(b) UA-
mm
Chapter 7 Solutions
Schaum's Outline of College Physics, Twelfth Edition (Schaum's Outlines)
Ch. 7 - 10. A motor furnishes 120 hp to a device that...Ch. 7 - 7.11 [I] Refer back to Fig. 7-2(d). If a force of...Ch. 7 - 12. In Fig. 7-7, the 300-N load is balanced by a...Ch. 7 - 13. Consider a machine for which an applied force...Ch. 7 - 14. With a wheel and axle, a force of 80 N applied...Ch. 7 - 15. A hydraulic jack in a gas station lifts a...Ch. 7 - 16. The screw of a mechanical press has a pitch of...Ch. 7 - 7.17 [II] The diameters of the two upper pulleys...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- A horizontal beam 10ft long has a variable load, zero at the leftmost end while 420lbf at the rightmost end. Calculate the total force felt by the beam. Use integration.arrow_forwardReview. The mass of a car is 1 500 kg. The shape of the cars body is such that its aerodynamic drag coefficient is D = 0.330 and its frontal area is 2.50 m2. Assuming the drag force is proportional to 2 and ignoring other sources of friction, calculate the power required to maintain a speed of 100 km/h as the car climbs a long hill sloping at 3.20.arrow_forwardTHE 500LB BOX IS RAISED USING ROPES AB AND AC. EACH ROPE CAN WITHSTAND A MAXIMUM TENSION OF 2500LB BEFORE BREAKING. IF AB ALWAYS REMAINS HORIZONTAL, DETERMINE THE MINIMUM ANGLE THROUGH WHICH THE BOX CAN BE LIFT.arrow_forward
- A pair of wedges is used to lift a crate as shown in The crate weighs 4000 lb, the wedge angle e is Fig. 18°, and the coefficient of friction is 0.15 at all surfaces. The weight of the wedges is negligible. Determine The force P necessary to remove the wedge or to pre- vent the wedge from slipping out Warrow_forwardThe following forces are acting on the bracket below. The bracket has a width w of 2 inches and a height h of 3 inches. The bracket is in equilibrium (not accelerating). Determine F3y knowing F1x-98 lbf and F1y=195 lbf. For this question, what is F3.y in Ibf? Note that the y- direction is pointing up, so if the force is pushing down on the bracket, it has a negative magnitude. 39arrow_forward7-54 The single-threaded screw of the floor jack has a pitch of 0.5 in. and a mean radius of 1.75 in. The angle of static friction is 8.5°. (a) Determine the couple C that must be applied to the screw to start lifting a weight of 4000 lb. (b) What is the couple required to start lowering the weight? 4000 Ib Fig. P7.54arrow_forward
- 1 b F2 1 1 FR F1 b. The figure above shows a crane tower on site at the HWY 1 expansion and Stoney Trail extension in NW Calgary. You are a design engineer working for the company supplying cranes for the contractors and you have been asked to evaluate the tower design. The crane tower supporting the pulley is designed so that the resultant force from the cable tension running over the pulley is oriented along the tower axis. Note: The tension in the cable is the same on both sides so ||Fill = ||F2l|| = T.arrow_forwardDetermine the height h above the base B at which the resultant of the three forces acts. 280 lb 40" 665 lb 40" 230 lb 40" Answer: h = in. the tolerance is +/-2% B.arrow_forwardA 25-ft chain with a weight of 30 lb is suspended between two points at the same elevation. Knowing that the sag is 10 ft, determine (a) the distance between the supports, (b) the maximum tension in the chain.arrow_forward
- Calculate the back extensor force (Fm) required to keep the trunk in the static position as shown. Calculate the bone compressive force acting on the lumbar vertebra. Calculate the bone shear force acting on the lumbar vertebra.  The weight of the trunk (Wtrunk) is 500 N, and it has a moment arm of 0.10 m. The weight of the arms (Warms) is 50 N, and it has a moment arm of 0.50 m. The horizontal force from the wall (Fwall-x) is 25 N, and it has a moment arm of 0.25 m. The vertical force from the wall (Fwall-y) is 50 N, and it has a moment arm of 0.75 m. The weight of the backpack (Wpack) is 25 N, and it has a moment arm of 0.15 m. The back extensor muscle has a moment arm of 0.05 m.arrow_forwardThe beam is subjected to applied loads as shown. Determine the shear at 12 ft from support A & shear at 6 ft from right end E. (Check all correct answers) 26 kips upward18 kips downward96 kips upward9 kips downward20 kips downward12 kips downward18 kips upward12 kips upward20 kips upward2 kips upward26 kips downward27 kips upward9 kips upward27 kips downward2 kips downward96 kips downwardarrow_forwardA spring stretches by 1.0 cm when it is loaded with a weight of 5.0 kg. Calculateforce constant of the springarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
Principles of Physics: A Calculus-Based Text
Physics
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Static Equilibrium: concept; Author: Jennifer Cash;https://www.youtube.com/watch?v=0BIgFKVnlBU;License: Standard YouTube License, CC-BY