Torque Definition and 1000 Threads

Homework Statement "A beam of mass M = 280kg and length L = 2.2m is attached to a wall with a hinge (at a 90 degree angle to the wall, sticking out horizontally), and is supported at the other end by a wire making an angle of 30 degrees with the horizontal beam. What is the force acting on...

Homework Statement Homework Equations F=ma τ = Iα = rF v=rω, a=rα L = Iω Center of Mass/Moment of intertia equations The Attempt at a Solution [/B] So right now I've tried to model the force acting on the ring as it goes around the peg, but I think centripetal force is involved and I'm not...

Homework Statement [/B] A rectangular wire of length 3 cm and width 2 cm is suspended vertically between two poles producing a uniform field of 2 T. Calculate the maximum torque acting on the wire.Homework Equations Torque = AIB sin(Θ) Maximum torque is when sin(Θ) = 1, so Maximum Torque = AIB...

Hello Consider a pulley with a rope winded up around it, and two solids attached to the rope from each side. It is intuitive that the solid with the most mass will impose the direction of the rotational motion of the system ( note that the pulley can rotate), but i'd like to know how can we...

Homework Statement , [/B] Please see the attached picture. But I'm trying to do is figure out where this moment would be created and how much torque would be applied based upon this example. Homework Equations T = fxd The Attempt at a Solution [/B] I would suspect that any weight added to the...

Homework Statement [/B] Homework Equations The relevant equations are obviously going to be the rotational equilibrium expressions regarding balancing clockwise and counterclockwise movement as it relates to T = Fx lever-arm. The Attempt at a Solution First...here is the answer that the...

First, not related to this figure, if there is a total torque T acting on a body, can I move this vector around the space by translation? Will I affect the system?Second, I don’t understand why can’t there be torque along the A-B axis. For example, if I apply a force to flip the gyroscope, the...

Homework Statement A cylinder of mass M and radius R is resting on a horizontal platform (which is parallel to the x-y plane) with its axis along the y- axis and free to rotate about its axis. The platform is given a motion in the x-direction given by x= Acos(ωt). There is no slipping between...

Homework Statement I am trying to understand which forces are up or down and left and right. I am trying to also find out the torque that would be clockwise and counterclockwise on the figure. Homework EquationsThe Attempt at a Solution Original Picture Edited Picture Arrows indicate...

My math ability is very limited. How would I determine the input torque required to rotate this radial cylinder arrangement? I started an editable Google Sheet here: https://docs.google.com/spreadsheets/d/1w9VebhPT0S78buN_33hN0ekUggX26lyB4BVugedR1zM/edit?usp=sharing I'm hoping to have a calc...

Homework Statement Homework Equations ## \vec \tau = \Sigma \vec r_i \times \vec F_i ## The Attempt at a Solution ## \vec \tau = \Sigma \vec r_i \times \vec F_i ## ## \delta W = \Sigma F_i \delta x_i ## Let's take our Cartesian coordinate system such that the axis of rotation...

Homework Statement A thin rod of length ' L' lies on the + x-axis with it's left-end at the origin. A string pulls on the rod with a force 'F' directed towards a point 'P' a distance 'h' above the rod. Where along the rod should you attach the string to get the greatest Torque about the...

Dear community, For one of the projects which I am currently working on, I want to quantify my three phase AC induction motor in the following ways: 1. Find Torque vs RPM Curve 2.Find Efficiency vs RPM Curve Now since I don't have the industrial "Torque Sensor" to plot Torque vs RPM curves, I...

I have found research from multiple sources and probably shouldn't question but I want to be clear. Inside a generator you have a fixed number of poles and a fixed number of induction coils, the particulars are not important. As a pole rotates past the "inductor" which holds the coil there...

I need to perform stress analysis for the stand for an industrial sized electric motor like pic related. The motor stands on four legs. I need to know the force that the legs of the motor exert on the stand due to its torque. I have all the dimensions of the motor including weight and torque...

Greetings all I have one question here. There is a centrifugal compressor that is driven by an the electric motor. the speed of the compressor is higher than the speed of the electric motor by using a gearbox with speed increaser. suppose that the motor speed is 3600 rpm and the compressor...

Hi, i need to do a pulley/shaft check on an existing system. Pulley is 840mm diameter and the motor has 47kw and 390 nm breakdown torque so to find the force from the belt can i assume that the force at the pulley o.d. distance is the force? So 390*0.84 will give the torque at that distance...

Hey I'm trying to work out a physics calculation, if I have a drawer (any type of drawer regardless of size), that sits on wheels so friction = negligible, and it is as an example 14 inch deep, 6 inches high, and 20 inches wide, it has an empty weight of 4 pounds, and a loaded weight of 10lbs...

I am referring to the output torque of an electric motor when the rotational speed of the rotor is 0 RPM. Some sources say that having a stalled torque damages some motors, and I know that some motors have a constant torque regardless of their speed while others have a max torque at 0 RPM. So If...

I have a problem where I have a large mass on wheels that I want to power with an electric motor. My hope is that I can find the torque i need to start and drive the motor and this is what I have so far. Mass = 400t. Initial velocity = 0 Final velocity = 2.5m/s Distance required to travel =...

Hi I have a problem dealing with rpm power and torque. I have a motor powering a gearbox which has a 20:1 ratio. The power and rpm are not an issue so i have not looked at those figures but the motor produces 240Nm of torque. Since it is a 20:1 gearbox, i have assumed the torque is 20 times...

Homework Statement Determine the mass of a 4.5 meter beam, if it is balanced on a fulcrum 2.04 meters from the left end. A 886 N man stands on the very left end, and a 393 N girl stands on the right end. [/B]Homework Equations T = Fr The Attempt at a Solution The torque applied by the man...

Hi , i really have an important question , first Iam an Arabic girl so my English may cannot be perfect ! SO ,, we took the TORQUE lesson in school and i found it hard to understand , can anyone JUST gives me some steps to understand it . AND THANK YOU FOR EVERY ONE ..

How to calculate torque and power at 'drive wheel' with following inputs and also requirement shown in below picture- a. Gear ratio, 1: 6 b. Attached 10Kg weight for bigger wheel to make as a crank wheel and diameter is 30inch. c. Bigger wheel: Consider 180 degree is freely rotates(due to 10kg...

Homework Statement The problem relates to the subject of torque and angular momentum: A man of mass ## M ## stands on a railroad car that is rounding an unbanked turn of radius R at speed v. His center of mass is height ## L ## above the car, and his feet are distance ## d ## apart. The man is...

Hello,I've read somewhere that during launch rapid change of RPM causes an increase in torque?What is the point of this?İs that the reason why cars tend to make tires slip when we try to launch at very high RPM?The extra torque added to engine torque?

Hi; In one of my projects I need a Rushton impeller to be used for mixing applications. However, these kinds of impellers are quite expensive(400$ for a 2inch impeller) if bought from laboratories equipment manufacturers. The price tag would be fine with me if only one blade was needed, but this...

Homework Statement Homework Equations [/B] T = inertia * alpha The Attempt at a Solution I'm not sure how the torque or angular velocity initially affects the time to speed, but it seems like the more angular velocity , then the quicker the engine would stop. I do know that more torque...

How can Force, sometimes instead of accelerating moves an object with a uniform motion. And how Power equals force into speed if force should accelerate. What does torque do, accelerate angularly or move object with unform angular velocity. How Power equals Torque into Angular Velocity if torque...

I tried yesterday with the gyro and did not make myself clear. So let me try with a windmill, please. I look at a windmill and I see the blades are spinning. Thus, the shaft axis has an angular velocity. I can ballpark and check the angular velocity with my eyes. I want a ballpark...

hi everyone i am working on a project of designing abearing machine i need to calculate the start up toqrue required to my system to move can anyone help?

Hi. I've read the following argument why the torques generated by internal forces add up to zero: Since by Newton's third law all forces come in pairs, so do all internal torques, adding them we get...

I'm trying to figure out whether it is best to use a multi-wheel or track system to get an object over a step, however I'm having a bit of trouble finding the torque needed for a track to pull itself up and over. Diagram of course is not to scale, but I've drawn up something of the situation...

Homework Statement I have no idea what torque of a friction in a bearing is. I'm looking for good explanation. Homework EquationsThe Attempt at a Solution I understand what torque/friction/bearing is. But I have no idea how they come together when looking at the actual mechanical problem. Help!

Homework Statement A loaded elevator acge has a mass of 1500kg and a countermass of 1000kg. The cage is accelerated with 2m/s² to 1,4m/s and lifted to a height of 15m and stops at stand still. The inertia of the motor or the radius of the cablewheel is NOT given. The steady state speed of the...

I need to find the maximum contortion of a torsion spring, for a given system. Most of the assignment I have done correct, but this last part I simply cannot get right. The pictures below is what I have used, but they are probably not necessary for this problem. In prior parts of the...

A couple of forces act on the screw and create the turning effect. But after sometime it gets harder. So, net torque is decreasing, but why is it decreasing? Frictional force comes into action, but friction doesn't depend on surface area. So, frictional force will remain constant. So what...

Hi So I am busy studying rotational motion and there's an example in the book where they explain that when a car brakes the force of friction acts as a torque force which explains why a car lifts up at the back when braking. Because the car does no rotational motion they say the net torque is...

I have a general understanding of how torque works, at least for "simple" objects that can be drawn as a single "bar" under the effect of various forces. In this problem there is a slightly more "complex" object though, and I'd like to know if there is a way to solve it without doing what I did...

Homework Statement A meter stick with a mass of 260 g is supported horizontally by two vertical strings, one at the 0-cm mark and the other at the 90-cm mark A) What is the tension in the string at 0 cm B) What is the tension in the string at 90 cm C) The string at the 90-cm mark is cut. What...

There is a tank that is 12' 2" long and 65" in diameter that is capable of holding 2000 gallons of liquid asphalt, which is calculated to be 8lbs per gallon, viscosity is 8000CP. There are 8 paddles in this tank that they want to rotate around 25rpm. The diameter of the paddle arms is 60"...

Homework Statement There is a lever rod of length 3.43 m, weight 44 N and uniform density. The lever rod is pivoted on one end and is supported by a cable attached at a point 0.902 m from the other end. The lever rod is in equilibrium at angle of 68◦ from the vertical wall. The cable makes...

Hi folks, I'm currently working on a final year project on the design of a plunger pump. The most recent area I have been studying is the loading on different joints in the pump. For a simplified example I have determined the maximum torque load on the crankshaft from the plungers for the...

Hello,I have been trying to wrap my mind around this question for a long time.So I thought it is best the way to share it with you. For a given car speed,the greatest acceleration comes when we are at peak horsepower RPM.This is true for any gear except the first gear.Because in any other...

This has been a huge limitation for me since picking up unity. So there's "Collision.relativeVelocity" which doesn't even represent a before/after change. There's "Collision.impulse" which gives some kind of averaged force. But collisions add force at points resulting in both force and torque...

In absence of any other forces, if you push a free object not on the center of mass, during the application of the force (not after) should it only rotate around its instantaneous center of rotation (also called pole or center of oscillation/percussion)? Or it can also be subjected to...

Question One What would be the effect on the following if the load torque is increased and the speed maintains constant (give reasons for your answer): A. the tension in the tight side of the belt B. the tension in the slack side of the belt C. the power transmitted. Not sure on how to solve...

Dear Members, I was reading a tutorial on ferroelectricity of liquid crystals, underneath is the excrept: "For ferroelectric materials, in addition to the dielectric torque, the electric torque will have a term due to the linear coupling between the spontaneous polarization" Could someone...

Hello friends, I'm currently working on an engineering competition project known as the Great Northern Concrete Toboggan Race, and I'm stuck on some preliminary calculations. I'm trying to calculate the amount of torque that will be required to rotate the front skis in order to turn the...

Well, my physics teacher taught us about rotation the other day and I came across a scenario where a sphere and a ring roll down a friction-less inclined plane from a point of absolute rest. I found it counter-intuitive as I started to think about why would they start rolling in the first place...