Concept explainers
In order to lift a shovelful of dirt, a gardener pushes downward on the end of the shovel and pulls upward at distance
Want to see the full answer?
Check out a sample textbook solutionChapter 12 Solutions
University Physics Volume 1
Additional Science Textbook Solutions
An Introduction to Thermal Physics
Physics: Principles with Applications
Essential University Physics: Volume 2 (3rd Edition)
The Cosmic Perspective
Introduction to Electrodynamics
Applied Physics (11th Edition)
- Determine the equivalent force-couple system at the center O for each of the three cases of forces (F = 340 N) being applied along the edges of a square plate of side d = 230 mm. The couple is positive if counterclockwise, negative if clockwise. y y F d F -d- F Answers: (a) R=( i i+ i j) N, Mo = i N-m (b) R= ( i i+ j) N, Мо- N-m (c) R= ( i i+ j) N, Mo = N-marrow_forwardThis problem concerns the concept of tension in a rope. Consider a rope subjected to a pulling force on its two ends as shown in (Figure 1). The rope is stationary. An arbitrary point P divides the rope into a left-hand segment L and a right-hand segment R. Figure wi L pull R 232 pull 1 of 3 Part A For segment R and segment L to hold together, they must exert forces on each other. What is the direction of the force exerted on segment R by segment L? View Available Hint(s) left right Submit Part B FLR Assume that segment R exerts a force of magnitude T' on segment L. What is the magnitude FLR of the force exerted on segment R by segment L? Give your answer in terms of T and other constants such as g. ► View Available Hint(s) = Submit % ΑΣΦ www ?arrow_forwardPROBLEM 02 Find the angle between two vector forces whose magnitudes are F and 3F and the magnitude of whose resultant 19 3F. PROBLEM 03 A force T passing through points A and B as shown, has a counterclockwise moment of 400 KN-m about point O. If the coordinates of points A and B are (0,6) and (8,0) in meters, compute the value of force T. PROBLEM 04 The resultant of the concurrent forces shown 15 1OOKN with O, of 60° directed DR. Determine the unknown force. Figure, PROBLEM 05. Refer to problem SP203. Q = 10 KN %3D Change P=25 KN up to the left at 30 degrees w/ x-axis, Q=30 KN, W=35 KN, T=18 KN directed to the right. F = ? 3| 4 P = 30 KN T = 20 KNarrow_forward
- The 58-kg cylinder is suspended from a clamping collar at C which can be positioned at any horizontal position x between the fixed supports at A and B. The cable is 15 m in length. Determine and plot the tensions in cable segments AC and BC as a function of x over the interval 0 ≤ x ≤ 13. Do your plot on a separate piece of paper. Then answer the questions to check your results. 13 m A B C 58 kg Questions: (a) If x= 3.1 m, the tension in cable AC is i N (b) If x= 9.1 m, the tension in cable BC is N Attempts: 0 of 1 used Save for Later Submit Answerarrow_forwardConsider a horizontal forearm. On one end of the forearm is the elbow, and on the other end is the hand. The forearm has a mass of 5.00 kg. The distance from the elbow to the hand is 34 cm. If the biceps muscle connects to the forearm a distance of 5.50 cm from the elbow, and the biceps muscle can supply a maximum force of 775. N (with the forearm in a horizontal position), what is the maximum mass (in kg) that the person can hold? (What equation can I use to solve this problem? Shouls I assume that the center of mass of the forearm to be midway/ in the middle between the elbow and the hand?)arrow_forwardThe slope of the 5.0 KN force F is specified as shown in the figure. Express F as a vector in terms of the unit vectors i and j. Assume a = 13, b = 6. Answer: F = ( F b i+ j) KNarrow_forward
- Problem 04.096- Resultant Force and Moment of a System of Forces The structure has two frictionless pulleys around which a string is wrapped. If W=56 lb, determine a force system that is equivalent to the forces applied by the string, where this force system consists of a single force, and specify the x coordinate of the point where the force's line of action intersects the x axis. (Round the final answers to four decimal places. Do not include a minus sign in your response.) 20 in. r = 2 in. 5 in. 4 in. The value of (FR)x of the equivalent force system is The value of (Fray of the equivalent force system is lb 1. The x coordinate of the point where the equivalent force's line of action intersects the xaxis is lb-. In.arrow_forwardThe upper leg muscle (quadriceps) exerts a force of FQ = 1080 N, which is carried by a tendon over the kneecap (the patella) at the angles shown in the figure. Find the magnitude of the force, in newtons, exerted by the kneecap on the upper leg bone (the femur) at the point P. What angle does the force from the kneecap act at, in degrees measured counterclockwise from the positive x-direction shown in the figure?arrow_forwardThe base of an automobile jackstand forms an equilateral triangle of side length 10 in. and is centered under the collar A. Model the structure as one with a ball and socket at each joint and determine the force in members BC, BD, and CD. Neglect any horizontal reaction components under the feet B, C, and D.arrow_forward
- Consider the following figure. (a) What force in newtons should the woman in the figure exert on the floor with each hand to do a push-up? Assume that she moves up at a constant speed. N (b) The triceps muscle at the back of her upper arm has an effective lever arm of 1.76 cm, and she exerts force on the floor at a horizontal distance of 19.6 cm from the elbow joint. Calculate the magnitude of the force in newtons in each triceps muscle. N Compare the magnitude of the total force exerted by both triceps muscles to her weight. total force exerted by both triceps muscles her weight = (c) How much work does she do in joules if her center of mass rises 0.230 m? J (d) What is her useful power output in watts if she does 26 push-ups in one minute? Warrow_forwardI am very confused about how to get the values. If they are computable using a calculator, please explain how to input them.An object set on top of a tripod is supported by the tripod. Assume that the tripod's legs meet at position D(0,7,0), where the object with weight W will be placed, and that the tripod's ends are located at points A(-2,0,-3), B(-3,0,-2), and C(2.5,0,-1). If the the maximum force a tripod leg can support is 500 N; find the answer.1. Solve for the magnitudes of forces AD, BD, and CD in terms of the weight W if the given configuration is in equilibrium.2. What is the maximum weight W that can be placed on the tripod with the given configuration?arrow_forwardFigure shows the two cables AO and BO tied together at O and the loadings are also shown. A В 30° 30° (a) Derive the expressions relating the tension in each cable as a function of a. 150N 200N (b) Write a MATLAB program to plot the tension in each cable for 0° < a < 90°. (c) Determine the value of a for which both cables OA and OB are in tension.arrow_forward
- Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage LearningPrinciples of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningUniversity Physics Volume 1PhysicsISBN:9781938168277Author:William Moebs, Samuel J. Ling, Jeff SannyPublisher:OpenStax - Rice University