Static equilibrium Definition and 349 Threads

Homework Statement So I have looked at several ladder example problems, (the most basic for statics), but was given a problem by my professor that has me a little stumped. This is day 2 of learning for me and I am caught up, here's the problem: A 30.8 kg beam is attached to a wall with a...

Homework Statement A mass of 0.311kg is attached to one end of a string, and a mass of 0.625kg is handing off the other end. The string goes over a pulley which has friction in its axle. What is the magnitude of frictional torque required to maintain static equilibrium? Homework...

Homework Statement The metal pole has a mass of 10kg, and the load has a mass of 50kg. The rope is attached so that it is ¼ of the pole’s length from the free end of the pole. Find the tension in the rope and the force at the hinge. Homework Equations The Attempt at a Solution

Homework Statement In static equilibrium a spring is stretched 0.25 m by a hanging mass. If the system is initially moved up to the unstretched position and released with zero velocity, determine position of the mass (in m) after 4.2s. Take the equilibrium position to be zero and up the...

Suppose that one has a heavy rigid beam supported by two vertical rods at two different points A and B, and wants to calculate the reaction R_A, R_B made by the rods. I found the reactions first by taking moments with respect to A, and then with respect to B. In both cases I included the...

Homework Statement (rotate picture 90 degree clockwise) A 50 lb weight is supported by a wire attached to a pulley at point B. The Pulley rests on wire ABC. If the tension in wire ABC is equal to 70lb determine the angle \phi necessary to keep point B in balance Homework Equations F=ks...

I was given 2 problems based on statics and I was wondering if anyone could help. Thank you - we just learned the concepts of statics TODAY and were given an assignment immediately, so any help would be appreciated. A window washer attempts to lean a ladder against a frictionless wall...

Static Equilibrium... Please help Homework Statement The J-shaped member shown in the figure is supported by a cable DE and a single journal bearing with a square shaft at A. Determine the reaction forces and at support A required to keep the system in equilibrium. The cylinder has a weight =...

Homework Statement A machine in an ice factory is capable of exerting 3.3 * 10^2 N of force to pull large blocks of ice up a slope. The blocks each weight 1.21 *10^4 N. Assuming there is no friction, what is the maximum angle that the slope can make with the horizontal if the machine is to be...

Hi I have some questions to go through for static equilibrium...I have the answers but I have no idea how to do these really - I am guessing most of them without really understanding I can't remember doing physics in shcool at all and since its been the best part of 20 years since school...

Homework Statement The bar is in static equilibrium W = 15N, Na = 11N and Nb which is perpendicular to the bar,Nb = 5.66N.What is the magnitude of tension forceT? Homework Equations The Attempt at a Solution W - Na - Nb*sin(theta) = 0; 15 - 11 - 5.66*sin(theta) = 0 theta = 45 deg...

1. Two people of equal mass are holding opposite ends of a rope and lean back 15 degrees with the vertical. What is the tension in the rope exerted by each person? This is how attempted to solve this. So tension is created by the force of gravity from them leaning back. So I drew a force...

Homework Statement One end of a uniform 4.00m long rod of weight Fg is supported by a cable. The cable is attached to the bar at an angle of 37.0o. The other end of the bar rests against the wall where its held by friction. The coefficient of static friction between the wall and the rod is...

Homework Statement During an isometric exercise for strengthening the biceps, an external force of 200 N is applied perpendicular to the forearm 0.3 meters from the center of rotation of the elbow joint. The elbow is flexed to 90 degrees and the forearm is supinated. The force produced by...

Homework Statement A door of width 1.08 m and height 1.92 m weighs 281 N and is supported by two hinges, one 0.600 m from the top and the other 0.600 m from the bottom. Each hinge supports half the total weight of the door. Assuming that the door's center of gravity is at its center, find the...

Homework Statement A 345 kg mass is supported on a wire attached to a 15 m long steel bar that is pivoted at a vertical wall and supported by a cable. The mass of the bar is 95 kg. (Take right and up to be positive.) http://img522.imageshack.us/img522/8374/1265alt.gif" (a) With the...

Homework Statement A stationary 3.0-m board of mass 6.0 kg is hinged at one end. A force is applied vertically at the other end, and the board makes a 30° angle with the horizontal. A 50-kg block rests on the board 80 cm from the hinge as shown in the figure below...

need to find T1 and T2...idk, i just can't find a solution, is it even possible to do it with the information provided?

Homework Statement A wheelbarrow has a mass of 35.0 kg without the wheel. When empty, the center of mass is 0.400 m from the axle. A load with a mass of 55.0 kg is put in the wheelbarrow, 0.600 m from the axle. Ophelia holds the handles of the wheelbarrow, 1.20 m from the axle. She lifts the...

Homework Statement The problem is attached below. Homework Equations Is there only 3 equations to be solved for? Sum of Forces in X and Y direction and Moment at A? The Attempt at a Solution I know everything needs to be set to zero. But getting beyond this is confusing me. The...

Homework Statement A person who weighs 620 N stands at x = 5.00 m, right on the end of a long horizontal diving board that weighs 350 N. The diving board is held up by two supports, one at its left end at x = 0, and one at the point x = 2.00 m. (a) What is the force exerted on the support at x...

Homework Statement Consider the situation of the figure, where a string of negligible mass and length L is fixed at two points A and B, with B dislocated of A by a distance w(<L) and vertically dislocated by a distance h < sqrt(L^2-w^2) A mass is hung on the rope using a moving pulley of...

Homework Statement Component diagram: include all forces, x & y, angles compare x components (are they equal?) do y-components equal 0? Homework Equations Fnet = ma = 0 = F + F + F... SOHCAHTOA The Attempt at a Solution Attached is my diagram with components drawn in. There...

Homework Statement A uniform ladder with mass m_2 and length L rests against a smooth wall. A do-it-yourself enthusiast of mass m_1 stands on the ladder a distance d from the bottom (measured along the ladder). The ladder makes an angle theta with the ground. There is no friction between the...

Homework Statement A diving board of length L is supported at a point a distance x from the end, and a diver weighing w_1 stands at the free end . The diving board is of uniform cross section and weighs w_2. Find the force at the support point. The Attempt at a Solution I used the...

Homework Statement Find θ and W in the figure below where w1 = 16.0 N, w2 = 25.0 N, and α = 66.5°, assuming that the arrangement is at rest. Homework Equations T_1=25/sin(alpha) F_x=-T_1cos(alpha)+T_2cos(theta) F_y=T_1sin(alpha)+T_2sin(theta)-2 The Attempt at a Solution I tried to...

Homework Statement This is actually an experiment we did at class. A horizontal beam was loaded with 100 grams weight at the left end. This beam was supported (with my hands) at 30 centimeters from the left end until balance is restored by putting another weight (168 grams) on the other...

Homework Statement Blocks A & B each have mass 5kg, and all contact surfaces are frictionless. Determine the force F needed to keep the blocks in static equilibrium, and the forces on all contact surfaces. Homework Equations I know I need to find where Fx= 0 and where Fy= 0. The Attempt...

Homework Statement A 9.8 m ladder whose weight is 257 N is placed against a smooth vertical wall. A person whose weight is 464 N stands on the ladder a distance 1.9 m up the ladder. The foot of the ladder rests on the floor 7.056 m from the wall. Calculate the force exerted by the wall...

Homework Statement A door made of a uniform piece of wood measures 1 m by 2 m and has a mass of 18 kg. The door is entirely supported by two hinges, one at the bottom corner and one at the top corner. Find the force (magnitude and direction) that the door exerts on each hinge. Assume that the...

Homework Statement A 90 N sign hangs on the end of a 55 N beam supported by a wire as shown. The beam is attached to the wall by a hinge. What are the horizontal and vertical componetns of the force on the hinge? Notes: the sign is 1.7 m from the wall the CG of the beam is located...

Homework Statement A 60 kg man hangs one meter from the end of an 8 m, 100 kg beam. A steel cable is attached to the end of the beam near the man, and the opposite end is supported by a frictionless pin (or a hinge). The system is originally at rest. The cable makes a 35 degree angle between...

In order for an object to be in static equilibrium a)the net force in all directions must be zero b)the net torque must be zero c) the object's velocity must be zero d) a and b are correct e) all of the above 2. I know that the net force in all directions must be equal to zero...

The mass of the sign shown is 28.5 kg. Find the weight supported by (a) the left support and (b) the right support. How do I set this problem up properly? Here is my set up even though I know its wrong. m = 28.5kg, mg = 279.3N Fl + Fr = mg Fl = mg - Fr t = torque, r =...

Homework Statement You are on a pirate ship and being forced to walk the plank. You are standing at the point marked C. The plank is nailed onto the deck at point A, and rests on the support 0.75 meters away from A. The center of mass of the uniform plank is located at point B. Your mass is...

Homework Statement a climber with a weight of 734.2 N is held by a belay rope connected to her climbing harness and belay device; the force of the rope on her has a line of action through her center of mass. The indicated angles are θ = 36.5° and ϕ = 29.0°. If her feet are on the verge of...

Homework Statement In the figure below, a uniform beam of weight 520 N and length 3.4 m is suspended horizontally. On the left it is hinged to a wall; on the right is it supported by a cable bolted to the wall at distance D above the beam. The least tension that will snap the cable is 1200 N...

Homework Statement A diver of weight 730 N stands at the end of a diving board of length L = 5 m and negligible mass. The board is fixed to two pedestals separated by distance d = 1.5 m. What are the magnitude and direction of the force on the board from the left pedestal? (Include the...

Homework Statement In the figure below, a uniform beam of weight 520 N and length 3.4 m is suspended horizontally. On the left it is hinged to a wall; on the right is it supported by a cable bolted to the wall at distance D above the beam. The least tension that will snap the cable is 1200 N...

[URGENT]Static Equilibrium problem A 11kg ball is supported from the ceiling by rope A. Rope B pulls downward and to the side on the ball. If the angle of A to the vertical is 22 degree and if B makes an angle of degree to the vertical find the tension in rope A. Homework Equations sum...

Homework Statement Consider the wheel-and-axle system shown below. a b m1 m2 Which of the following expresses the con- dition required for the system to be in static equilibrium? 1. b2m1 = a2m2 2. a2m1 = b2m2 3. am2 = bm1 4. am1 = bm2 5. m1 = m2 003 10.0 points Nobody at the...

first timer here and non english spoken so I might get few mistakes but but... Question is about static equilibrium and about with clock and against clock principe. When figuring out momentum til a point first we define if its positive or negative. I understand that its our choice to define...

Homework Statement A weight of 200 pounds is supported by a cable system as shown. Determine all cable forces and the force in the vertical boom BC.Homework Equations The Attempt at a Solution i separated the x compontents and y components: x:CAcos60-CDcos36.86989765+DEcos15=0 y...

Hello! I'm a student from Norway, and I've been struggling with a static equilibrium for a few hours now. The terms I use might not be "right", but I'll try to explain the problem to the best of my ability. Homework Statement Find the forces Fa and Fb on this figure...

Homework Statement The system (picture found in attachment) is in static equilibrium, and the string in the middle is exactly horizontal. Find a. Tension T1 b. Tension T2 c. Tension T3 d. angle (theta) Homework Equations sin=opp/hyp cos=adj/hyp The Attempt at a Solution a. Using...

Homework Statement A window cleaner of mass 95 kg places a 22-kg ladder against a frictionless wall at an angle of 65 degrees with the horizontal. The ladder is 10m long and rests on a wet floor with a coefficient of static friction equal to 0.40. What is the maximum length that the window...

I have no basic idea about this lesson, how can you solve for this problem? http://tinypic.com/m/5aizk3/3 thanks

Homework Statement In Figure 12-36, horizontal scaffold 2, with uniform mass m2 = 35 kg and length L2 = 2.0 m, hangs from horizontal scaffold 1, with uniform mass m1 = 45 kg. A 17 kg box of nails lies on scaffold 2, centered at distance d = 0.50 m from the left end. What is the tension T in...

A 1.2 kg board 2.0 m long is pivoted exactly at its center. A 2.0 kg box is at one extreme end. For the board to remain balanced, a 5.6 kg box should be placed how far away from the other end Homework Equations mass1(.5)(2.0)= mass2 (d) The Attempt at a Solution .357 meters

Homework Statement A 75 kg window cleaner uses a 10 kg ladder that is 5.0 m long. He places one end on the ground 2.5 m from a a wall, rests the upper end against a cracked window and climbs the ladder. He is 3m up along the ladder when the window breaks. Neglect friction between the ladder and...