Torque Definition and 1000 Threads

Assuming we have a cylinder that is rotating on a single axis, how would I go about calculating the torque knowing the following information? m = 2000 kg w = 60 rpm r = 5 m

Homework Statement Calculate the Belt pull, drum torque, motor power and speed required to drive a flat top belt given the following information: Belt centres are 4.0m Required speed is 18m/min Drum diameter is 300mm Belt mass is 3.0kg/m Belt is fully loaded with 32kg boxes 0.8m long Belt...

Hi i have a question regarding torque with impact guns and high torque drills. So i just bought a impact gun which is rated at 1000nm at 2200 rpm how can this have such high torque were my cars engine makes only 400nm at 2500rpm So i guess my question is how can we compare these torques to...

Homework Statement A solid disk of diameter equal to 500 mm and a mass of 60 kg is to be used as a flywheel in an energy recovery device. Determine the torque required to accelerate the rotation of the flywheel, about its axis, from rest to 250 rpm in 6 revolutions. Homework Equations [/B]...

Hi, I'm trying to ascertain when you're driving an asynchronous motor with VVVF or whatever else a VSD uses, when do you draw the most current? For instance, say you're talking about a train/tram: I would have thought intuitively that since power = torque / angular speed, that starting up, to...

Homework Statement Homework Equations T = fd f = mg The Attempt at a Solution I appear to be suffering from autism. Heres my working out... F(bar) = 200 Two support forces of equal length, each 0.5 m from fulcrum (given). Therefore torque magnitude is the same. 100 N on both sides = counters...

Hello everyone, I have a problem while calculate dynamic for gyroscope system on bicycle. I use Lagrange's equation for modelling precession effect, with generalized coordinate is a angular, the applied generalized force will be a torque. The model of gyroscope system like picture below: I've...

I am trying to figure out the torque needed for an auger, but I seem to run into a wall. The auger is 6.00 inches in diameter and 44 feet long and on a 17% incline. The weight of the product going through the auger is 29lbs per cubic foot. So I calculated the cubic feet of the auger, 3.14 *...

So for my current project, I need to hold a crystal on a platform that needs to turn on the scale of microradians. I'm accomplishing this with a 1.8 degree/full step stepper motor that I'll be microstepping by 1/256 full step. To get to microradians, I'll need an additional division of steps...

I am looking to build a skateborad like device that i want to power with electric skateboard-like system. However I only want it to go 1.1m/s using 60mm wheels moving a 100kg load for 12 km. I am looking for help determining gear sizes, motor sizes and specs, really anything. I have seen so...

I'm trying to figure out what type of motor I need to use that has the ability to lift a 7'-9' pole that has about 5-8 pound weight attached to it at the end. The max angle that the poll will be is 180 degrees and the motor will need to lift it to 90 degrees. As for the weight its not a free...

Homework Statement A uniform rigid scale is held horizontally with one of its end at the edge of the table and the other supported by hand. Some coins of negligible mass are kept on the meter scale. As the hand supporting the scale is removed, the scale starts rotating about its edge on the...

Hi guys, It's been a while since I've done much resolving forces stuff, and I'm struggling to make sure what I'm doing is right. I have a setup like below, and I want to find the torque around point D due to the force acting at point A. I've had a couple attempts but I feel like I'm just...

Hi all. Brushing up on some of my force and torque stuff so I can do some modelling in software. Homework Statement I have a system as shown in the picture. A force F acts at point A, which is the end point of the lever AB. Connected to the lever is a link BC, and connected to BC at point C is...

The Attempt at a Solution I took the pivot point to be the hinge point and calculated the torque to the force of gravity as well as tension. So T=Ia=0=L*T*sin(180-θ)+(L/2)*F g *sin(θ) which yields T+(1/2)F g=0 so shouldn't T=mg/2? However, this is not an answer choice.[/B]

Homework Statement A cube of mass M rests tilted against the wall as shown (see below). There is no friction between the wall and the cube, but the friction between the cube and the floor is just sufficient to keep the cube from slipping. When ##0\lt\theta\lt 45^\circ## find the minimum...

Is it true that torque and axial force are stronger than linear force? If I hit something with an acute angle and progressively turn it into a lower angle while moving forward,is it applying more force?( for example needle insertion)

Dear friends, i want to know if flywheel (30inch) 96kg weight running on 1400rpm then how much power can save in hp or tarque? and how much power required to drive this wheel? regards kashif

Homework Statement A bridge, constructed of 11 beams of equal length L and negligible mass, supports an object of mass M as shown in the picture. Assuming that the bridge segments are free to pivot at each intersection point, what is the tension T in the horizontal segment directly above the...

Homework Statement At one point during its swing, a wrecking ball exerts a tension force of 9800 N on its cable, which makes an angle of 30 degrees with the horizontal. The crane's 9 m long boom is at an angle of 55 degrees with the horizontal. What is the torque exerted by the wrecking ball on...

Homework Statement (a) Suppose you have just barely loosened a rusty bolt. Your mass is 80 kg and you have a wrench of length L = 50 cm placed as shown in the diagram below, and hung off the end so all your weight was applied, in the downward direction, to the end of the wrench. What is the...

Homework Statement A child is initially sitting near the outer rim of a revolving merry-go-round. Suddenly, the child moves towards the center of the merry-go-round (while it is still revolving). For the merry-go-round+child system, let the symbols L and K refer to the magnitude of the angular...

Homework Statement 8. A 20 kg uniform beam 10m long is attached to a wall with a cable. The cable is attached to the middle of the beam at a 90 degree angle to the beam. A box of mass 5 kg is also suspended from the beam. In addition to this, the beam is attached to the hinge at the bottom...

My question may be very simple for most of you but it's giving me great difficulty and your help would be greatly appreciated! So a helicopter with a counter clockwise rotation rotor will want to turn its nose in the opposite direction because of torque effect. This demonstrated Newton's third...

The red section of this fixture rotates 90 degrees it weighs 3600lbs, and is 130 inches wide. It is made out of 10 inch steel channel. On the left of the drawing is the dimension of 40" and the pivot point is actually in the center. We can rotate it by hand if you grab onto the end that is...

Hi, we know that the speed varies inversely with the torque. The more the torque, the lower the speed. From torque-speed curve, we can calculate the slope. When the applied voltage increases, the straight line shifts upward while when the voltage decreases, the straight line shifts down. How...

Homework Statement A rotating flywheel slows down only because of friction in its bearings. At the initial time ti, the angular speed of the flywheel is 2.0 rad/s. The power due to friction at a later time tf is half of the power due to friction at time ti. The angular displacement of the...

Homework Statement This is a more conceptual question so I just need the steps for this. Basically the board is hanging from the ceiling by a spring, with only its bottom corner touching the ground. Near the middle (but not exactly) there is mass hanging off of the board. I need to find out how...

Hi PF! If we have two concentric cylinders with Newtonian fluid between them, and the small cylinder is at rest and the larger cylinder with radius ##R## rotates at some angular velocity ##\Omega##, how would you calculate torque ##\vec{T}## on the outer edge? My thoughts: ##\vec{T} =...

I have a hydro turbine spinning at 62.746RPM and it produces 170.195Nm of torque. It generates 1.1183kW but ideally, I would like to step it up to at least 4.5kW. Is this possible using a gearbox and if so how can it be done?

I'm currently working on a design for a go-kart-like vehicle which involves some calculations. The engine used is a motorcycle engine and it is mounted to the main chassis via steel rods. I would like to know how the engine torque (i have an estimated value of ~45Nm) will cause stress and...

Homework Statement (please do not read anything not english) Homework Equations torque=r cross T and I alphaThe Attempt at a Solution I feel that the 3 cases will be different every time but I can't get the hang of the equations.

Hello everyone Im new on the forum and I just discovered what are sync machines... I have really basic question what I still cannot figure out.. I did some experiments with motor for different field currents and torques. In the result I measured armature currents and did V curves. But next...

Consider a small rigid spherical particle of radius a, fully immersed in a viscous incompressible Newtonian fluid of shear viscosity η above a hard-wall with stick (no-slip) boundary conditions, located at the plane z = 0. A constant positive (external) torque Tx is applied on the particle. My...

Hi, I need to choose a hydraulic hub motor for a vehicle which weighs 25 000 N when fully loaded. The vehicle must be able to start moving (fully loaded) on a inclined surface (30 degrees angle). So I need to determine the torque needed to get vehicle moving. The vehicle has three wheels from...

Homework Statement [/B] Rotator cuff strength test. Patient's elbow is flexed 90 deg. while the shoulder is abducted 90 deg. and externally rotated 90 deg. The therapist applies pressure to the dorsal surface of the hand/wrist. If this is the patient's dominant arm, and the length of her upper...

Hello guys, I am doing some basic design work and can't remember how offset torques work. I am doing the sum of the torques should be equal to 0 in order to find the tipping point around either of the wheels. My problem is with the 1000N applied at to top taking the pivot point around the...

I'm comparing the torque developed by two different engine concepts. One is a new fandangled concept being built that lends itself to a simple torque equation F x r x sine theta (Force, radial vector of the crank, angle of Force) because it has only one angle of Force being applied to the...

Hello, I'm designing a machine as a final assignment for my internship. It's a machine that wraps SS tubing around a cylinder, making coils. While trying to figure out how much torque I'd need to rotate the cylinder I found that I'm really in the dark on the subject (the teacher I had didn't...

Hello all, These days I am studying rotation and rolling of bodies. We know a body can be made to rotate about any point. Let's assume that an external force is acting on the rotating body fixed about the point of rotation, and this force made the body rotates faster that is its torque produces...

Homework Statement Two ladders, 4.00 m and 3.00 m long, are hinged at point A and tied together by a horizontal rope 0.90 m above the floor (Fig. P11.89). The ladders weigh 480 N and 360 N, respectively, and the center of gravity of each is at its center. Assume that the floor is freshly waxed...

Have a general question about torque. I have a 102 inch diameter, ring shaped, flywheel that weighs 500 pounds. It is rotating at 25 RPMs. I know that the energy produced is 1304 joules, but you need to know how many Nm that equates to. Second question: this flywheel is placed in a...

Problem A 60kg woman walking at a speed of 1.0 m/s steps onto a long plank that has a mass of 60kg. Upon stepping on the plank, both she and the plank begin to slide with speed v and spin with angular rate ω on a frictionless surface. 1. How far from the woman is the center of mass of the woman...

Homework Statement A cylindrical bar magnet whose mass is 0.08 kg, diameter is 1 cm, length is 3 cm, and whose magnetic dipole moment is <5, 0, 0> A · m2 is suspended on a low-friction pivot in a region where external coils apply a magnetic field of <1.4,0,0> T You rotate the bar magnet...

Hi guys, I'm working on a project where I need to find the torque produced by the rear wheels of an RC car so that I can convert it into power and then into the current required by the motor. So T=ω×Pmech → Pmech → Pelec → Imotor Here are the details for the car: 1kg weight Torque on each rear...

Greeting fellow physicists, I have been having some questions from my AP Physics C: Mechanics students about the direction of friction in rolling. Here are a few situations. 1. For a wheel that is accelerating to the right while rolling smoothly, it must also be rotating clockwise. In order to...

Homework Statement A 500-N person stands 2.5 m from a wall against which a horizontal beam is attached. The beam is 6 m long and weighs 200N (see diagram below). A cable attached to the free end of the beam makes an angle of 45 degrees to the horizontal and is attached to the wall. Homework...

High school student here I am designing an experiment to test the effect of temperature on the torque required to twist a piece of metal, and need some advice on where to start researching. What I need help with is A) finding a table of the torque required to twist steel when cold, and B)...

I've been reading my physics book and there they derived the formula ∑τ = Iα where τ is torque, I is moment of inertia of a rigid body and α is the angular acceleration. They did by taking an arbitrary particle on the rigid body with an applied external force tangent to the rotation. τ1 = Ftan *...

A friend of mine posed a question to me the other day and I can't seem to wrap my head around it. He's working with an electric stepper motor to turn a large thin disk, but he can't be sure of the torque required because to find the torque he needs the moment of inertia and the angular...