4. The figure below shows a bird feeder that weighs 141.9 N. The feeder is supported by a vertical wire, which is in turn tied to two wires, each of which is attached to a horizontal support. The left wire makes a 60° angle with the support, while the right wire makes a 30° angle. What is the tension in each wire (in N)? You must show work to get full credit. 60° T2 30 T1 T3 Bird food

4. The figure below shows a bird feeder that weighs 141.9 N. The feeder is supported by a vertical wire, which is in turn tied to two wires, each of which is attached to a horizontal support. The left wire makes a 60° angle with the support, while the right wire makes a 30° angle. What is the tension in each wire (in N)? You must show work to get full credit. 60° T2 30 T1 T3 Bird food

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter9: Statics And Torque

Section: Chapter Questions

Problem 37PE: (a) What force should the woman in Figure 9.45 exert on the floor with each hand to do a push-up?...

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(a) What force should the woman in Figure 9.45 exert on the floor with each hand to do a push-up? Assume that she moves up at a constant speed. (b) The triceps muscle at the back of her upper arm has an effective lever arm of 1.75 cm, and she exerts force on the floor at a horizontal distance of 20.0 cm from the elbow joint. Calculate the magnitude of the force in each triceps muscle, and compare it to her weight. (c) How much work does she do if her center of mass rises 0.240 m? (d) What is her useful power output if she does 25 pushups in one minute?
The Iron Cross When a gymnast weighing 750 N executes the iron cross as in Figure lN.91a, the primary muscles involved in supporting this position are the latissimus dorsi (lats") and the pectoralis major (pecs"). The rings exert an upward force on the aims and support the weight of the gymnast. The force exerted by the shoulder joint on the arm is labeled Fs, while the two muscles exert a total force Fw on the arm. Estimate the magnitude of the force Fw. Note that one ring supports half the weight of the gymnast, which is 375 N as indicated in Figure P8.91b. Assume that the force Fw acts at an angle of 45 below the horizontal at a distance of 4.0 cm from the shoulder joint In your estimate, take the distance from the shoulder joint to the hand to be L = 70 cm and ignore the weight of the arm.
An object is subjected to three forces as shown in the figure. Assume F1 = 50.0 N and F2 = 95.0 N, what is T if the object is in static equilibrium? Enter a number with three significant digits.
A 160-N child sits on a light swing and is pulled back and held with a horizontal force of 120 N.The magnitude of the tension force of each of the two supporting ropes in newtons is: Answer must be according the correct signifcant numbers.
A hungry bear weighing 700. N walks out on a beam in an attempt to retrieve a basket of goodies hanging at the end of the beam. The beam is uniform, weighs 200. N, and is 6.00 m long, and it is supported by a wire at an angle of 60°. The basket weighs 80.0 N. a. Draw a force diagram for the beam. b. When the bear is at 1.00 m, find the tension in the wire supporting the beam and the components of the force exerted by the wall on the left end of the beam. c. If the wire can withstand a maximum tension of 900. N, what is the maximum distance the bear can walk before the wire breaks?
QUESTION 9 A diver of mass 74.6 kg stands on one end of a diving board of mass 27.6 kg, as shown in the diagram. Everything is in equilibrium (since nothing is moving). What is the magnitude of the support force on the opposite end of the diving board? A 575 N B 1,599 N C 959 N D 2,399 N
5) Consider a rigid steel beam of length L = 14.5 m and mass mb = 375 kg resting on two supports, one at each end. A worker of mass mw = 76 kg sits on the beam at a distance x from support A. Refer to the figure, though note that it is not drawn to scale. a) Enter an expression for the force support B must exert on the beam in order for it to remain at rest, in terms of defined quantities, x, and g. b) When the worker sits at a distance x = 7.5 m from support A, calculate the force, in newtons, that support B must exert on the beam in order for it to remain at rest. Use g with three significant figures. c) The force exerted on the beam by support A is measured and found to be FA = 2390 N. At what distance x, in meters, from support A is the worker sitting now?
A 70.0 cmcm, uniform, 40.0 NN shelf is supported horizontally by two vertical wires attached to the sloping ceiling (Figure 1). A very small 15.0 NN tool is placed on the shelf midway between the points where the wires are attached to it. 1. Find the tension in the left-hand wire. 2. Find the tension in the right-hand wire.
Physics for Engineer. 1. A 50.0-N body is supported by two ropes, one making 30.0o with the vertical and another making 45.0o with the horizontal as shown in the figure. What is the tension in the ropes?
The weightless strut in the figure below is not attached to the wall; it is prevented from falling only by friction. (Let w = 375 N, L = 5.05 m and h = 3.10 m. (a) Find the magnitude of the force of friction between the wall and the strut.(b) Find the normal force exerted by the wall on the strut.(c) Find the minimum coefficient of static friction. please solve thank you
Two identical strings making an angle of ? = 25.3° with respect to the vertical support a block of mass m = 15.7 kg (see the figure below). What is the tension in each of the strings? (Enter your answer in N.)
1. A 160kg utility pole extends 12.0m above the ground. A horizontal force of 250N acts at its top and the pole is held in the vertical position by a cable. a. Draw a free-body (or force) diagram for the pole. b. Determine the tension in the cable. c. What are the reaction forces exerted at the lower end of the pole by the ground? 2. A 40.0kg uniform platform is suspended by two cables, 2.00m apart, where the centre of the platform lies midway between the cables. A 5.00kg paint bucket is placed on the platform, 24.0cm to the right of the right cable. Determine the tension in each cable.