Rod Definition and 1000 Threads

Homework Statement An electric dipole consists of 1.0 g spheres charged to +(-) 2.0 nC at the ends of a 10-cm-long massless rod. The dipole rotates on a frictionless pivot at it's center. The dipole is held perpendicular to a uniform electric field with field strength 1000 V/m, then released...

Homework Statement The pendulum with a light rigid rod l has a mass m attached to it's end. It is put in a horizontal position and released from rest. At what angle grom the vertical will the tension in the suspension equal to the weight in magnitude? Homework Equations The Attempt...

Homework Statement Hi all :biggrin: The Attempt at a Solution This was a solution to my problem i found on internet ... I found w2 correctly like in solution ... but then when i thought that that net force will be force due to rod (F) - mg cos37 ... along rod ... and mg sin37 perpendicular...

Here we have got a very long rod (100 million km length or so) built/placed on the lunar surface (near equator) and directed towards the Sun (imagine that Moon is in synchronous rotation with Sun and therefore that point (where this rod is built) is always looking at the Sun). The distance...

Could anyone who actually works on this kind of thing answer a couple of questions about the current situation in Japans nuclear crisis : Is it true that cooling pools for spent fuel rods are stored on the rooves of these reactors ? If so we see two of these rooves have been blown off - so...

Hello. I know that control rods in reactors work by absorbing neutrons that would otherwise be used to collide with say, Uranium, to cause fission. But here is the part I do not understand: As far as I understand, a Uranium atom fissions because it absorbs a neutron causing it to become...

Homework Statement A slender rod shown in the figure has a mass m and length l and is released from rest when theta=0 degrees. The horizontal and vertical components of force which the pin at A exerts on the rod at the instant shown in the figure is ? The Attempt at a Solution I have some...

Homework Statement a) Calculate the electrostatic force on an uniformly charged rod of length 2L and charge q, which lies along the axis of an uniformly charged ring of radius R and charge q'. The centers of the charged rod and the rings are displaced at a distance z= z0. b)Show that if z0 >>...

Homework Statement Hello, the problem i have with finding the potential is the integration limits. Assuming both the rod and point lies on the x axis. When i integrate the sum of many slices of rod, ill get 2 answers(negative and positive) depending on the limits i use. Example i ended up...

Homework Statement Find an expression for the electric potential a distance z away from the center of a thin uniformly charged rod of length L on a line that bisects the rod. Homework Equations V=k\frac{Q}{r} The Attempt at a Solution Determine the electric potential due to one...

Hi everyone, I recently started studying heat conduction using differential equations and this has been stumping me for a while. I am having trouble understanding what type of heat conduction problem this is. We are given a 100cm long copper rod with ends maintained at 0 C. The center of the...

a steel rod, 40mm in diameter and 1.00m long, is pinned at each end i) calculate the euler buckling for the rod ii) identify three other possible end fixity conditions for the rod and demonstrate how euler buckling load would be affected in each case iii) explain the relation between the...

Homework Statement A thin rod has mass M and length L. What is the moment of inertia tensor about the center of mass if placed along the x axis. Homework Equations I would write the inertia tensor in component notation, but I don't know how to use Latex. The Attempt at a Solution...

The A-36 steel rod is subjected to the loading shown. If the cross-sectional area of the rod is 50 mm^2, determine the displacement of C. Neglect the size of the couplings at B, C, and D. Please help, I don't have any idea how to begin. I can't seem to sum the forces right.

Homework Statement A copper rod of mass 0.6 kg rests on two rails 1.3 m apart and carries a current of 31 A from one rail to the other. The coefficient of static friction is 0.3. What is the magnitude of the least magnetic field that would cause the bar to slide? Homework Equations F=...

Charge Q is distributed uniformly over a thin rod... Homework Statement Charge Q is distributed uniformly over a thin rod of lying along the x-axis between points (a,0) and (b,0) as shown. Please answer each of the following questions. a) What is the linear charge density on the...

Imagine the skyscraper and the very long rod placed on its top that rotates from horizontal position to upwards. http://img109.imageshack.us/img109/4817/fhfn.png I would like to know how is it possible to calculate/ascertain the maximal length and minimal width of the rod made of some...

Homework Statement A small ball with mass 1.70 kg is mounted on one end of a rod 0.750 m long and of negligible mass. The system rotates in a horizontal circle about the other end of the rod at 5030 rev/min. (a) Calculate the rotational inertia of the system about the axis of rotation...

Homework Statement Sorry, I don't have a picture, so I can only relate this in words, so I have to indirectly translate it to drawing: So you have a 0.15 m rod titled at a 45 degree angle above a horizontal , like this: \ Now rotate it some distance away from a vertical axis. The bottom of...

A lead rod and a common glass rod both have the same length when at 21.0° C. The lead rod is heated to 50.0° C. To what temperature must the glass rod be heated so that they are again at the same length? I did this: L = a*L0*T a (thermal expansion) of lead = (29e-6) a (thermal expansion) of...

I was under the assumption that the electric field for an arbitrary length of wire was 2\lambda/r. In this problem A thin rod extends along the z-axis from z = -d to z = d. The rod carries a charge uniformly distributed along its length with linear charge density lamda. By integrating over...

Hello All, One of my science teachers puts a glass rod in his coffee, but he won't tell us why... I was wondering if there was a physic/chemistry related explanation to this. He said that the effect did not occur before when he didn't put it in. Adding the glass rod ''solved the...

Homework Statement A steel rod having a cross-sectional area of 0.005 m^2and length 3 m is attached to supports at both ends. Find (a) the force exerted by the rod on the supports if the temperature falls 60ºC and the supports are unyielding, and (b) the force exerted by the rod on the...

Homework Statement Calculate the tensile stress in a rod 40 mm in diameter with a load 200 KN ? Homework Equations pi*r^2 The Attempt at a Solution 3.14 * (20*20) = 1256 mm^2 200 * 1000 = 200 000 N 200 000 / 1256 = 159.24 N/mm^2 Tensile stress = 159.24 N/mm^2...

hi.. I am new to this site. I want to know about reasons of failure of connecting rod of 4 stroke petrol engine. In this case the rod has broken into two parts from the small end of the rod. The manufacturing root of the component is hot forging - hardening - induction softening of the small...

Hello >:D Homework Statement <Q>A rod of length L is pivoted at one end and is rotated with a uniform angular velocity in a horizontal plane. Let T1 and T2 be the tensions at the points L/4 and 3L/4 away from the pivoted ends respectively. <a> T1>T2 <b> T1<T2 <c> T1=T2 <d> The relation...

Homework Statement An upright standing rod of mass m and length 2l receives a small push at the top and falls. The floor is smooth. the height of the center of mass at any given time is h, according to the drawing. Show that the velocity of it's center of mass is...

Hi guys! I bought a portable immersion water heater, it posses a hook on the heating element & on it i found a ground symbol. For heating purpose heating element is enough why the hook is given. This may look lil bit silly but i just want to know abt.

if i take a thin glass rod sealed at one end fill some gas at 1 atm in it and then add 760mm mercury and invert the rod then will the mercury not fall? also will the pressure of the gas change? i do not see any reason for this to happen! :( Thanks in advance!

Homework Statement A force is rotating the rod of mass m and length l round it's endpoint, according to drawing. The force rotates either, so as to simplify the problem. What force, apart from the one opposed to the centrifugal force, acts at the bearing? Homework Equations M=I\alpha...

[SIZE="3"][FONT="Georgia"]This is part of the space elevator problem. It starts with a swinging rod scenario: 1. Suppose that you swung a rod of mass m and length l at angular speed w in a vertical circle with your shoulder as the axis. The distance ra is the length of your arm, which is the...

Homework Statement Two infinite parallel wires, having the cross sectional area 'a' and resistivity 'k' are connected at a junction point 'P'. A slide wire of negligible resistance and having mass 'm5 and length l can slide between the parallel wires, without any frictional resistance. If...

Homework Statement http://www.phys.uri.edu/~gerhard/PHY204/tsl330.pdf full solution here Homework Equations The Attempt at a Solution Here is solution of problem for positively charged rod. What will be the difference if I take negatively charged rod? Why I start integration from d...

Homework Statement In the figure below, a small 60 g block slides down a frictionless surface through height h = 20 cm and then sticks to a uniform rod of mass 105 g and length 40 cm. The rod pivots about point O through angle θ before momentarily stopping. Find θ. (Picture attached)...

Hello Physics Forums. I've read the forum on and off for a while and have always found that the folks here have given such thorough answers that I've had nothing more to contribute! :) But I finally have the need to ask a question. I work in a physics lab and we are trying to determine the...

Homework Statement The heat equation for an infinitely long rod is shown as: \alpha^2 \frac{\partial^2}{\partial x^2}u(x,t) = \frac{\partial}{\partial t}u(x,t) u(0,t) = u(L,t) = 0,\ \forall \ t > 0 u(x,0) = sin(\pi x) \ \forall \ 1 < x...

I have a uniform rod laying on a table. A ball comes in and hits the rod making it move backwards but also rotating. Assuming that we are in a frictionless environment, how do describe the circle made by the rod?

Homework Statement A 1.80 m long thing rod is balanced vertically on its tip on the floor. It starts to fall and its lower end does not slip. What is its angular speed just before it hits the floor? Homework Equations 1/3ML^2 L=mvr The Attempt at a Solution When I first started...

Homework Statement A long, thin rod of mass M and length L is standing straight up on a table. Its lower end rotates on a frictionless pivot. A very slight push causes the rod to fall over. As it hits the table, what are a)the angular velocity and b) the speed of the tip of the rod? I'm...

Homework Statement At 20° C, a rod is exactly 20.05 cm long on a steel ruler. Both the rod and the ruler are placed in an over at 250° C, where the rod now measure 20.11 cm on the same ruler. What is the coefficient of linear expansion for he material of which the rod is made? Homework...

7. 0/10 points All Submissions Notes Question: SerPSE8 11.P.037. Question part Points Submissions 1 2 0/5 0/5 4/100 2/100 Total 0/10 A wooden block of mass M resting on a frictionless, horizontal surface is attached to a rigid rod of length script i and of negligible mass. The rod...

A rod has mass M and length L. Calculate the moment of inertia of the rod about an axis which is passing through its center of mass and forming an angle \theta to the rod. I drew a diagram on an xy-plane where the rod is on the x-axis and the center of the rod is at the origin. Chopping the rod...

Hi I am trying to solve this problem. I already got the answer but have some questions. A long uniform rod of length L and mass M is pivoted about a horizontal, frictionless pin through one end. The rod is released from rest in a vertical position, as shown in Figure P10.61. At the...

Homework Statement A rod of mass m and radius R rests on two parallel rails that are a distance d apart and have a length L. The rod carries a current I and rolls along the rails without slipping. A uniform magnetic field B is directed perpendicular to the road and the rails, pointing...

Homework Statement A 4.80 -kg ball is dropped from a height of 10.5 m above one end of a uniform bar that pivots at its center. The bar has mass 8.00 kg and is 4.00 m in length. At the other end of the bar sits another 5.10 -kg ball, unattached to the bar. The dropped ball sticks to the bar...

Homework Statement The uniform rod (length 0.60 m, mass 1.0 kg) in Fig. 11-54 rotates in the plane of the figure about an axis through one end, with a rotational inertia of 0.12 kg·m2. As the rod swings through its lowest position, it collides with a 0.20 kg putty wad that sticks to the end of...

Homework Statement A thin rod extends along the z-axis from z=-d to z=d, carrying uniformly distributed charge along it's length with charge density lambda. Calculate the potential at P1 on the z-axis with coordinates (0,0,2d). Then find an equal potential at point P2 somewhere on the x-axis...

Homework Statement Consider a rigid rod-plus-disc system Find the moment of inertia of the pendulum as it freely rotates about the point P. The rod has a length 0.62 m, and the disc has a radius half that. The pivot at P is a fourth of the way from the end of the rod. The rod has a mass of...

a rod is vertically placed in x-y plane a slight disturbance is given to it so that it is inclined at an angle (90-a) with the horizontal. find the acceleration of the centre of mass i think that the path followed by the centre of mass would be elliptical so its acceleration can be gsina

Unfortunately the piston has disintegrated so we are unable to use that to form an opinion on this failure. Please let me know your thoughts, thank you! http://www.maperformance.com/gallery/pictures/rodfailure1.jpg [PLAIN]http://www.maperformance.com/gallery/pictures/rodfailure2.jpg...