Static Definition and 1000 Threads

Homework Statement A 2 kg block rests on an inclined plane with an angle of 30. A force of 5 N is applied to the block in a direction down the incline plane until the block begins to move when the force reaches 7.3 N, what is the approximate coefficient of static friction between the block and...

Homework Statement The cylinder in the drawing weighs 100[N]. there is a horizontal rope at the top that prevents it from rolling. what is the coefficient of friction if it's on the verge of movement Homework Equations Friction force: f=μN The Attempt at a Solution The whole weight of the...

An air-track glider of mass 0.100 kg is attached to the end of a horizontal air track by a spring with force constant 20.0 N m (Fig. 6.22a). Initially the spring is unstretched and the glider is moving at 1.50 m s to the right. It is calculated that with an air air track turned off, a glider...

Homework Statement A block of mass m is at rest on an inclined plane of angle θ with respect to the horizontal. There is friction between the block and the inclined surface (μk and μs). Now, assume that the value of θ is less than the value in part A) (so that the block will remain stationary...

Hello! (Smile) A static stack is implemented with the use of a one-dimensional array $A$. Suppose that we have a pointer $S$ to a struct that has two fields, the array $A$ and the integer Length, and represents a stack. According to my notes, the operation Push for a static stack is the...

Homework Statement A bowling ball rolls without slipping up a ramp that slopes upward at an angle β to the horizontal. Treat the ball as a uniform solid sphere, ignoring the finger holes. Explain why the friction force must be directed uphill. Homework Equations F=ma, torque=I(alpha)...

Homework Statement A horizontal scaffold, of length 2.00 m and uniform mass 50.0 kg, is suspended from a building by two cables. The scaffold has dozens of paint cans stacked on it at various points. The total mass of the paint cans is 80.0 kg. The tension in the cable at the right is 830 N...

Homework Statement Consider an ideal stationary magnetic dipole ##\vec{m}## in a static electric field ##\vec{E}##. Show that the fields carry momentum ##\vec{p} = -\epsilon_0\mu_0\left(\vec{m}\times\vec{E}\right)##. Homework Equations Momentum stored in electromagnetic fields: ##\vec{p} =...

Dear Cosmology People, Einstein added just enough ad hoc dust to a universe with hyperspherical topology and positive spatial curvature to bring about stasis. Is a similar thing possible with a pseudohyperspherical universe with negative curvature, something opposite of dust, that would have...

Homework Statement Does that container full of water gives a torque on Earth ? http://imageshack.com/a/img537/6733/9Y0Hqq.png Homework Equations -- The Attempt at a Solution I drawn all interesting forces : http://imageshack.com/a/img540/9315/ymwwvW.png Like that there is a torque...

Homework Statement There is a box that has a mass of 30 kg. The coefficient of the static friction is 0.75. Find the horizontal force. Homework Equations Fs=muFn F=ma The Attempt at a Solution Fs=(.75)(.98)(.30)=.2205 N That is probably way off... I am very confused right now. Could someone...

Homework Statement I have a question about the following question: Firstly, shouldn't there be a normal force for each hand (part a), but here they treat it as one normal force. Also in part b, why isn't the torque for Fn1h = 0? Since that is the pivot point, isn't the moment arm zero?

If I built up static in me and then touch a doorknob and get shocked, am I then sufficiently grounded to be able to touch electrical components? Or was it just that the extra electrons were discharged and I should still ground myself in another way before touching electrical components?

I would like to know if any experiments have been conducted to determine the effect of a time varying magnetic field on a static electrically charged object. If so, are they any links to these experiments on the web Thanks.

I don't really have a specific problem, but for example, I was doing a problem where a constant force unwounds a spool of wire (a disk). The force pulls at the top of the disk to the right and the force of static friction is also at the bottom to the right, the same direction as the sphere is...

Hello! (Smirk) Suppose that we have an algorithm of the form: Algorithm(NODE *P){ static int s=0; Algorithm(P->RC); ...... Algorithm(P->LC); ...... s++; } where P is the root of a binary tree, for example this one: When we call the function Algorithm(a), s will get the value...

I have to make 2 ramps of 30 cm long along with 2 objects(objects need to be 8 cm long). One must be slippery so that it has a low coefficient of friction and one needs to be sticky and have the highest coeffivient of friciton possible. Bassically we place object on ramp raise it from one side...

Homework Statement http://prntscr.com/5aj6fz Homework Equations Efy=0 Efx=0 EM=0 The Attempt at a Solution I drew a FBD and assigned x and y components at A. There is a normal force at B and F and M are known. I took this to mean that there are 3 unknowns in the problem, which should be able...

Hi! (Wave) I am looking at the operations of a static queue. pointer MakeEmptyQueue(void) pointer Q; /* temporary pointer */ Q = NewCell(Queue); /* malloc() */ Q->Front = 0; Q->Length = 0; return Q; I have to find the complexity of the above...

In many books & articles that I have read; static pressure has been defined as pressure of a fluid at rest. In some articles, it is said to be the pressure which is applied against frictional forces in a fluid. But I want to know how a fluid develops static pressure & what is basic force in this...

Homework Statement A rock is suspended by a light string. When the rock is in air, the tension in the string is 35.7N . When the rock is totally immersed in water, the tension is 25.9N . When the rock is totally immersed in an unknown liquid, the tension is 19.6N . Homework Equations Density =...

In a recent class, my instructor covered the Kinetic Theory of gases. My question is in regard to the theory which states 1) The size of the individual molecues in a gas are so small that their volumes can be considered negligible. The instructor then mentioned that the paticles in the gas can...

Homework Statement Homework Equations Static equilibrium: Net force & net torque = 0 The Attempt at a Solution Am i doing this correctly for part a? [/B]

Homework Statement A ladder,10 m long and having a mass of 25 kg, rests on a rough horizontal floor and is supported by a rough vertical wall. The ladder is inclined at 60 degrees as shown and starts to slip when a person having a mass of 75 kg has climbed halfway up it. The coefficient of...

Homework Statement Find approximate expressions for T1 and T2 that are valid when h/d << 1 and h/x << 1 Homework Equations T_{1} =\dfrac{mg\left(d-x\right)}{dh}\sqrt{1+\dfrac{x^{2}}{h^{2}}} T_{2} =\dfrac{mgx}{d}\sqrt{1+\dfrac{\left(d-x\right)^{2}}{h^{2}}} h^{2}...

Homework Statement The answer is to be given in terms of L and w. The picture shows a beam of weight w and various blocks on it also each of weight w. It also shows the gravitational force acting downward on the center of gravity of the beam. The beam rests on a triangular pivot point. 2...

I have made a pitot tube that I am using to measure the velocity of air in a pipe. First, I placed the probe into the pipe such that the hole in the probe was parallel to the flow to obtain static pressure. It did this successfully and I proved this using a piezometer. However, I then turned the...

1. Homework Statement Calculate the torque on the dam about the origin (Picture attached) due to the pressure force of the fluid. Homework Equations Pressure force is correct (dF) The Attempt at a Solution [/B] I have solve it; however, I am not sure if I calculated over the origin asked...

Homework Statement You are designing the crosspiece for the A-frame structure in the figure below. Beams AB and AC are 3.35 m long and have a mass of 350.0 kg each. How much tension must the crosspiece EF withstand? Assume that the mass of the crosspiece and the friction at points B and C are...

Homework Statement A rope of negligible mass is stretched horizontally between two supports. When an object of weight 3160N is hung at the centre of the rope, the rope is observed to sag by 35.0cm. What is the tension in the rope? Homework EquationsThe Attempt at a Solution [/B] Sum of...

Would a Klein Tools Non-Contact Voltage Tester or similar be able to measure static electricity? If not what will? https://www.google.com/search?q=how...hop&q=Klein Tools Non-Contact Voltage Tester

Let us imagine that there is a Massless spring with fixed at one end. Unloaded length = L Spring constant: = k Mass = 0The spring is at static Equilibrium Force: F Displacement: d F = k d, elongated length: L+d If I remove F, what will happen ? 1. Spring return to...

Hi Gang, I have a basic understanding of electricity and magnetism but I am unclear on something. I will be quite general here so please read through my poorly worded questions and try to see what I am really trying to understand. Assumptions: An active current loop with DC current emits a...

Homework Statement The system shown in Fig. 2-6 is in static equilibrium. Use the principle of virtual work to find the weights A and B. Neglect the weight of the strings and the friction in the pulleys. Homework Equations Conservation of gravitational potential energy. The Attempt at a...

Homework Statement How would I find the static displacement of a spring due to maximum applied force? I asking this for arbitrary equation say ##m\ddot{x} + kx = F(t)##. Homework Equations Hooke's law The Attempt at a Solution I don't know how one would do this. Would it be find the...

Hello I am creating a torsional testing rig for a Formula Sae car, the front of the car will be pivoted about the center on a beam with the loading off to one side. In the design I need to calculate the deflection of the beam in order to determine which material and what profile of metal will...

Homework Statement http://postimg.org/image/4fhu5k9r9/ Can someone explain what is meant by 'missing water' in this solution diagram The original question diagram had no such water above the gate AB Homework Equations The Attempt at a Solution

Homework Statement The system shown is released from rest. Mass one (0.450 kg) rests on mass two (0.820 kg) and the coefficient of static friction between the two masses is 0.560 and the same for the mass and the table. Determine the maximum mass for M(3) such that mass one will not slide on...

Hello all, I am calculating the loads on an unconstrained structure in space that is accelerating. There is a constant known force (T) being applied to it at one end (point A). The structure is a rocket with distributed mass but let's assume it is a uniform beam with constant density. I would...

Homework Statement I got this problem: A wedge of mass m = 36.1 kg is held in place on a fixed plane that is inclined by an angle θ = 21.3° with respect to the horizontal. A force F = 302.3 N in the horizontal direction pushes on the wedge, as shown in Figure 4.25a. The coefficient of kinetic...

Homework Statement I'm trying to understand how static friction opposes the motion of a moving car. From what I have read, the car tyre doesn't move relative to the ground. The car tyre pushes on the ground and the ground pushes back - this is how the car moves. The force of friction is in the...

[b]1. Problem I am currently doing a home experiment about the coefficient of static friction. I've set up a ramp and am testing at which angle a tissue box begins to movie (with five different masses in it)... Although for every mass I use the angle seems to remain the same. The angle at...

How does the texture of a surface affect the concentration of charge on that surface? Say we compare a balloon (smooth) and a football (textured) (ignoring material differences) and give them the same total charge. Then we introduce dust particles. How do the two surfaces attract dust...

This is not a homework question, just a simple physics question which I decided to ask here. I held off from asking in the other general physics forum because I get accused of asking random questions that are insignificant. I really want to understand these terms and how they are compared in...

thinking about growing cacti in a tropical climate...could i perhaps build a charged scaffold around them to keep most of the rainwater away? if this is possible i might lose the walls i tend to stay in as well by upscaling it.

static electricity diagram Hello! I am new here! I need your help... How would I draw a simple diagram to show how static electricity is made use of in a photocopier to position the black toner where is needed. It sounds a litte bit tricky and I think how it would looks like. Thanks in...

I am making a basic structural engineering software program for modelling cylindrical pipes. I want to model the effect of fluid inside the pipes. For static fluid I let the user input the internal pressure and density of the fluid in each element. For moving fluid I additionally want to let...

I was reading that if a balloon is rubbed against cloth, it becomes charged and therefore it sticks to a wall for a short time if I place it against a wall. So how come if I have a non-static charge (current charge) and then I placed small bits of paper besides it, the paper doesn't stick as...

For example, in chemical plants, if a pressure gauge is on a pipe and it reads 5000 kPa, is this a static or total (static + dynamic) pressure reading? I am thinking it must be the total pressure. Would that mean that a pressure reading in this setting is both a measure of static pressure...

I am new to pumps and wondering how to calculate the total static head for the system below.