Torque Definition and 1000 Threads

i need to know how to calculate the torque needed to apply through my hand to hold a certain hand drill in place while drilling in concrete wall so that the hand drill willl rotate the bit instead of my hand.

Homework Statement In an attempt to find a transfer function of the system, I need to come up with equations that I can use to solve for unknowns. See the attached image to see the diagram of the pulley system. J is the moment of inertia, r is the radius. The smaller radius on pulley 2 is r1...

Actually I have 2 questions. 1-) How do we calculate the torque that the engine generates? t=F.d so F= The force piston exerts on crank arm. and d= length of crank arm. Can we calculate like this or is it completely different? 2-)Torque values of a car in the technical information is the...

I'm trying to calculate the required gear sizes for the system shown below: The driven wheel is connected to a 600mm diameter bicycle wheel and the driver wheel connected to a 580 mm long lever arm which has a forward driving force of 40 N. I want to calculate the most efficient sizing of...

Hi All, I'm hoping you all can help me with what I think should be some relatively simple calculations. I'm looking to determine how large (diameter / weight) of a flywheel a particular AC motor can spin from a stop to full RPM given the torque / HP of the motor. For instance, if I have a 1/3...

Homework Statement An object of mass 1000 kg is lifted by means of a steel lifting cable being wound round a drum of diameter 2.5m mounted on a horizontal shaft. The drum and shaft have a mass of 1000 kg and a radius of gyration of 1.0 m. What is the torque required to give the object an upward...

Hello! I am an AP Physics student and had a quick question for validity. I was prompted with this question in class today: Example 7: An 8-meter ladder of weight 355 N leans at an angle of 50° to the floor against a smooth vertical wall. Assume the center of weight (gravity) for the ladder is at...

I am currently working on designing a drive system for a vehicle, and I am calulating the necessary torque to accelerate a vehicle. I am using the guidelines of this source: http://www2.mae.ufl.edu/designlab/motors/EML2322L%20Drive%20Wheel%20Motor%20Torque%20Calculations.pdf I still feel that...

<Moved from a technical forum. Therefore no template.>I am currently analysing the forces acting on a moving vehicle. The vehicle is mounted on a rail with wheels on both upper and lower side of the rail with a spring increasing the reaction force, and thereby the friction. The vehicle should be...

Greetings! I am currently making a program which is about lighting columns. And I am currently at a halt because I need some basic physics done before I can complete it. I have a lighting column which is L = 8 m D = 0.087 m M = 69 kg I have a force, applied from the wind load, at F = 1235...

Homework Statement Homework EquationsThe Attempt at a Solution I understand in general the argument of the problem, the only thing which I'm not sure of is why the gravity doesn't affect the torque. My guess is that it gets canceled by the normal force that is applied on the axle but I'm...

Homework Statement Disks A and B each have a rotational inerita ##0.300 kg.m^2## about the central axis and a radius of of ##20.0cm##and are free to rotate on a central rod through both of them.To set them spinning around the rod in the same direction,each wrapped with a string that...

Homework Statement A pulley with a rotational inertia of ##10^{-3}\frac {kg} {m^2}## about its axle and a radius of ##10 cm##, is acted on by a force applied tangentially at its rim.The force magnitude varies with time as ##F=0.5t+0.3t^2## , with ##F## in Newtons and ##t## in...

Visualize a simple balance, a pan at either end of a beam which balances on a fulcrum. The way it works is that if each pan carries the same weight, it balances horizontally. If one pan carries slightly more weight, it tips slightly off horizontal. If one pan carries more weight yet, it tips...

Homework Statement A tangential force F acts at the top of a thin spherical shell of mass m and radius R. Find the acceleration of the shell if it rolls without slipping. Homework Equations Since the shell is rolling, friction does not act at the bottom. So equating the torque, F*R= I*α The...

Sorry If the thread name confuse you. I want to know if I want to find the Torque from deriving Kinetic Energy and the system has Object the Rotate and the rotating cause linear motion(v). Let's say it a Rolling Disc on the non-slope plane which has angular velocity ω and that ω cause it to move...

1. Homework Statement a circular homogenic pulley (disk) with radius R and mass of M hanging on a axis that passes through his center, the pulley rotating without friction. we wrap the pulley with a rope with a total mass of mr and length of L and in the other side of the rope we ataching...

Homework Statement Find out the amount of force exerted by the screwjack/motor to lift the spill door upwards. The length of the different linkages is known as well as an estimate of the weight of the spill door. Homework Equations Torque = Force x Distance The Attempt at a Solution All I...

This isn't a real homework problem (i.e. I made this problem up myself for my own purposes), but I figured this is the correct forum to post. 1. Homework Statement In the following figure we have two rods connected to each other, and the bottom rod is connected to the blue structure (G), and G...

Homework Statement The sketch shows, from two views, a simple pulley system for raising large masses. A light, inextensible cord attached to a mass m is wound, without slipping, on a cylinder of radius r. Rigidly joined to this cylinder and mounted on the same central shaft is a cylinder of...

Homework Statement From the diagram below find the position of the man (##x##) if the system is in balance. Total length is ##L## and the man is distance ##x## from one end. Homework Equations 3. The Attempt at a Solution [/B] I know that the system must be in balance if all the torque and all...

Homework Statement Find the period of small oscillation of this system. Homework Equations 3. The Attempt at a Solution [/B] I understand the concept of moment of inertia but can't comprehend the first equaion here. The other two i get and they are moments of inertia of other two bodies...

Hi, everyone. I am facing issues in trying to solve a problem on a wheel in magnetic fields. Since I was not able to access physicsforums, I wrote up everything about my issues and the question in a pdf file that I am attaching accordingly to this post. It is even typed up in the format of...

Hi, I'm trying to calculate the force required to move the wheel on a standard wheelchair from stand still and then consistently over a flat surface? I understand that this has to with the amount of weight that is trying to be moved, this being the weight of the user (approx. 68kg) and the...

why force parallel to the axis of rotation do not make any torque.

Homework Statement [/B] A thin, uniform, 3.8kg bar, 80cm long has two 2.5 kg balls glued on at either end. It is supported horizontally by a thin, horizontal, frictionless axle passing through its centers and perpendicular to the bar. Suddenly the right hand ball becomes detached and falls off...

Homework Statement A 2.9-kg particle P is located at [(r)\vec] = 3.3 m [^(x)] + 1.8 m [^(y)] from the origin of the x-y coordinate system shown in the Figure. It moves with a velocity of [(v)\vec] = −4.1 m/s [^(x)] + 2.6 m/s [^(y)]. A force, [(F)\vec] = 2.7 N [^(x)] + 1.4 N [^(y)] acts on the...

I volunteer with an athletics group that has some large mats that they roll out for practice and I started thinking of a way for us old timers to roll them up at the end of practice. The mats are rolled up on a reel, that when empty is 14" in diameter, when full with the mats the diameter is...

Hi, I am a beginner in terms of mechanics and am an electrical engineer so I apologize in advance for asking what may be trivial questions. I am attempting to create a prototype design for an electric vehicle (truck) in which I am mimicking the Telsa drive train configuration but I am stumped...

Hello, guys. In field oriented control of ac machines, the electromagnetic torque is proportional to the q-axis current. We can control instantaneous torque by control the q-axis current. If the torque we want is a constant value,with PI controller, no problem, no steady error. But if we want to...

Homework Statement In bicycling, each foot pushes on the pedal for half a rotation of the pedal shaft; that foot then rests and the other foot takes over. During each half-cycle, the torque resulting from the force of the active foot is given approximately by τ = τ0 sin ωt, where τ0 is the...

Homework Statement A wheel of moment of inertia 5×10-3kg-m2 is making 20 rev/s. Find the torque required to stop it in 10s is (A) 2π×10-2Nm (B) 2π×102Nm (C) 4π×10-2Nm (D) 4π×102Nm Answer - (A). Homework Equations ω=2πƒ (ƒ=frequency) Power (P) = Γω. P = W/t. W = ΔK.E. = (1/2)Iω2. The...

Hi, I'm trying to program a simple physics engine from scratch as an exercise, and I'm starting with manipulating a stick with the mouse pointer. As of now, it dangles from one end demonstrating simple pendulum physics. Now, I want to add a friction component to the "axle" it's rotating on to...

Background: (I'm a beginner) I plan on using PCV pipe for the main body. The drill's purpose will be to install screws into pre-cut groves (basically a motorized screwdriver). These screws will be only a couple centimeters tall so the motor will only need a moderate amount of torque and rpm. It...

Homework Statement We have a box has W as widht and h as height.Now when we push it on top of it, it does not slide but the side is closest to us is lifting. We consider center of the mass in center. Homework EquationsThe Attempt at a Solution I think the reason of lifting just one corner is...

To include slonczewski-like torque in the Lagrangian there enter as dissipation by Rayleig function? ST= σ m x (m x mp) where m is the magnetization in free layer and mp current direction in the pinned layer (-z). The Rayleig function is: RF=(dm/dt+σ m x mp)2 Then L= ∫ (RF+E)dx Thanks

Homework Statement A 355.0N boy and a 300.0.0N girl sit on a 50.5N porch swing that is 1.5m long. The swing is supported by a chain on each end. What is the tension in each chain when the boy sits .35m from one end and the girl sits .45m from the other? ( ans: boys side = 390 N, girls side =...

I am a little rusty at the moment but let's say I have an axle with two loads being applied to it. Both 500 lb. I am trying to figure out the various stresses on it so i can determine a suitable diameter for the axle connecting the tires. The two tires and axle are all one piece. The bearing...

We have a 1500lb steel drum that has a 8 foot diameter that we need to rotate to wrap up air filter material. The drum is supported by bearings on both sides and needs to turn at 0.02rpm. I calculated the torque, using T=Moment of Inertia * Angular Acceleration. For the moment of inertia I...

Suppose I have a motor driving a shaft that runs 1.5m long with a screw attached, the screw is mixing a product. Power = Torque x Speed Torque = Power/Speed To find my Torque I can use my Shear Max = Tr/J And J for a shaft is Tmax = (π / 16) τmax D3 My question is, where does the mass of the...

Hey, folks! So upon studying for my Physics final tomorrow, I came across this question on the practice exam, which I know the answer is D from the solution key. However, I'm not sure how to get that for the answer. 1. Homework Statement Homework Equations τ = rA × Fnet LA = Ltrans, A + Lrot...

Hi, I'm training an advanced calisthenics exercise called the planche. And I noticed a while ago that doing it with my legs apart (this is called "straddle planche") it's noticeably easier than if I put my legs together (this is called "full planche"). In fact the first is used as a transition...

how demonstrate the formula ? the relationship between Force and Voltage and Torque? how to prove that this formula? << e-mail address deleted by Mentor >>

Homework Statement A six-cylinder four-stroke internal combustion engine, running at 2,200 rpm, outputs 120 kW of brake power. The stroke is equal to the bore. The brake mean effective pressure is 5.5 MPa. Calculate the torque, total displacement volume, stroke and bore. Homework Equations...

Homework Statement To lower himself from a balcony an 80kg stuntman grabs a rope connected to a 400kg cylinder with a 1.2m diameter that is free to rotate about its axis of symmetry. What is the stuntman's acceleration as he falls? Homework Equations I missed this on a homework assignment. I...

Homework Statement A 0.100-kg, 59.9-cm-long uniform bar has a small 0.055-kg mass glued to its left end and a small 0.100-kgmass glued to the other end. You want to balance this system horizontally on a fulcrum placed just under its center of gravity. no diagram given Homework Equations Στ = 0...

I understand that the torque on a gyrating object is defined as the force vector cross multiplied by the lever arm position vector, which produces a resultant vector that is normal to both of the original vectors. However, when an object (let's say a disk) is rotating about an axis...

Homework Statement A 180V separately excited DC motor has an armature resistance of 1.2ohm. When the note runs at 1200rpm,t he armature current is 10A. 1) Assuming that motor torque is constant at all speeds,d determine the mechanical torque and power developed in the motor. 2)Find the speed of...

Homework Statement An electric motor turns a flywheel through a drive belt that joins a pulley n the motor and a pulley that is rigidly attached to the flywheel. The flywheel is a solid disk with a mass of 80.0kg and a radius R = 0.625m. It turns on a frictionless axle. Its pulley has much...

I have a set of 4 ball screws, 2 inch diameter by 0.50", one in each corner to lift up a 12,000lb transformer. Each side will have one motor driving a right angle worm gearbox in the center that will power the two other right angle gearboxes that turn the ball screws. I was given that the...