Monday, October 18, 2021

How To Increase Torque Physics

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Would Adding More Gear In A Series Increase Torque

Turning the Motor and Maximising Torque | Motors and Generators | Physics

PrudensOptimus said:Hi,Would more Gearings aligned in a series on a rack mean more Torque? And also,… what gearing should I use on motor: ones that is alot bigger than the ones on the series, or ones that are a lot smaller? which ones would generate more torque rather than speed? Would the rack’s length have a difference in determining the torque? Here are pictures to illustrate my situation.


Thanks for the prompt response,For my lack of knowledge, what is the difference between Driven Gear and Drive Gear?


PrudensOptimus said:I have a “SPEED” servos that goes 360… But it looks like a motor to me… What is the difference between a servo and a motor anyway? Other than a standard servo goes 180deg while motor goes 360… Seems to me motors have more horsepower.Anyways, wouldn’t you think those plastic pieces would break somehow? Cause with the setup i have in those pictures, the servos would just “stuck”… and sometime i can hear it try to run over those 3 gear trains…. is it just because I have wrong setup?EDIT: also I dun need to turn all that much. about 30deg is perfect. i just need to “tilt” or drag the “claws” up a little as needed to go over small obstacles.


Torque And Angular Acceleration

In this section, we will develop the relationship between torque and angular acceleration. You will need to have a basic understanding of moments of inertia for this section.


Imagine a force F acting on some object at a distance r from its axis of rotation. We can break up the force into tangential ), radial ) . , the radial component \ and the z-component \. All components of force are mutually perpendicular, or normal.)

From Newton’s Second Law, \

However, we know that angular acceleration,;\ , and the tangential acceleration atan are related by:;\

If we multiply both sides by r , the equation becomes

Note that the radial component of the force goes through the axis of rotation, and so has no contribution to torque. The left hand side of the equation is torque. For a whole object, there may be many torques. So the sum of the torques is equal to the moment of inertia , \ multiplied by the angular acceleration, \.

If we make an analogy between translational and rotational motion, then this relation between torque and angular acceleration is analogous to the Newton’s Second Law. Namely, taking torque to be analogous to force, moment of inertia analogous to mass, and angular acceleration analogous to acceleration, then we have an equation very much like the Second Law.

Arms Partially Extended Overhead

This example the athlete has their arms partially extended overhead. Here the moment arm is increased compared to the first example . The distance of the arms from the body increases. This means in the moment equation the distance variable will increase, which in turn increases the torque and puts a greater demand on the torso to maintain body posture.

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Special Cases Of Torque

A couple of key points about the above equation, with some benchmark values of :

  • = 0° – The force vector is pointing out in the same direction as r. As you might guess, this is a situation where the force will not cause any rotation around the axis … and the mathematics bears this out. Since sin = 0, this situation results in = 0.
  • = 180° – This is a situation where the force vector points directly into r. Again, shoving toward the axis of rotation isn’t going to cause any rotation either and, once again, the mathematics supports this intuition. Since sin = 0, the value of the torque is once again = 0.
  • = 90° – Here, the force vector is perpendicular to the position vector. This seems like the most effective way that you could push on the object to get an increase in rotation, but does the mathematics support this? Well, sin = 1, which is the maximum value that the sine function can reach, yielding a result of = rF. In other words, a force applied at any other angle would provide less torque than when it is applied at 90 degrees.
  • The same argument as above applies to cases of = -90° , but with a value of sin = -1 resulting in the maximum torque in the opposite direction.

How Do You Create Torque


There are three factors that determine the amount of torque on an object:

1) the force applied to the object

2) the distance between the axis of rotation and the force being applied

3) the angle between the force vector and the distance vector

The relationship between force, distance, and torque can be seen in the mathematical expression:;

Torque = Force x Distance;

To increase torque, either increase the force being applied or the distance between the point where force is being applied and the axis of rotation .

To understand this, lets first imagine a door. The door has hinges on one side. To successfully open the door, you need to apply a force. This force will cause the door to rotate about its hinges, or its axis of rotation.;

But do you know of any buildings that have doors with handles across the front instead of doorknobs? You might have seen these in your school, or in an apartment building. Have you ever tried to open one of these doors by pushing close to the hinges? It wont work, even if you use all of your strength. But if you push the handle on the side furthest away from the hinges, the door easily swings open. Thats because you have increased the distance between the force and the axis of rotation .

Of course, your opponent is trying to do the exact same thing to you. So an arm wrestling match is basically a contest of who can create the most torque.

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How Do You Increase Torque In Physics

This would depend on what you want to increase the torque on. For instance, if you need to tighten a bolt and you need more torque, you should pick a tool with a longer arm as this increases the torque.

But in cases where you need to increase the torque of motors which are already running, you need to include a gear ratio which results in the decrease in the rotational speed while the torque increases.

Does Gear Ratio Affect Horsepower

Heres what the numbers mean, how they relate, and how they affect performance: Torque is a measure of the rotational force applied to the engines crankshaft and ultimately to the drive wheels. A higher numeric axle ratio keeps the engine running in the higher horsepower range, thus improving performance.

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What Is Torque In Physics

Torque refers to a measure of a force acting on any object which causes the object to start rotating. The object rotates around a certain point known as the pivot point. The distance from the point where torque acts to the pivot point is the moment arm or r.

This moment art is also a vector and it points from the rotation axis to the point where torque acts. In other words, torque refers to the product between the moment arm r and the force vector a which is the angle between F and r.

When you use the right-hand rule, you can locate the direction of the torque vector. To do this, place your fingers in the direction of r. Then curl your fingers to the direction of F. After doing this, your thumb will point in torque vectors direction.

Whats Better Hp Or Torque

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Torque, simply, is the ability of a vehicle to perform work specifically, the twisting force applied by the crankshaft. Horsepower is how rapidly the vehicle can perform that work. Because there is generally a limit on how fast you can spin an engine, having higher torque allows for greater horsepower at lower rpms.

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Using Moment Arms To Cause Perturbations

Actively changing moment arms during a movement can create perturbations. These perturbing forces increase the dynamic demand on the body, meaning the torso has to react to fluctuations in force. A way to create these perturbations in the back extension would to aggressively press and pull your hands your above your head and back towards your body .

How Does Angle Affect Torque


180 degrees

Furthermore, how moment arm affects torque? The moment arm of a force system is the perpendicular distance from an axis to the line of action of a force. In other words, moment arm determines the quality of the torque. An important concept to remember is that the moment arm changes with the angle of application of the force .

Keeping this in consideration, what factors affect torque?

Below are a few main factors that determine torque:

  • Current: Increasing current will increase the torque output of the motor.
  • Voltage: Increasing voltage will allow your motor to have high torque at high speeds.
  • Motor Frame Size: Choosing a larger motor will provide more torque.

What is Torque example?

Torque is a twisting force that tends to cause rotation. A bigger force does mean a bigger torque. For example, if you’re pushing on a door, then the distance to the hinge is the perpendicular distance — the line to the hinge is at 90 degrees to the force arrow .

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How Do You Increase The Torque On An Object

In an arm wrestling match, there are two ways to increase torque . First, you can increase the amount of force you produce. This would mean youd have to go to the gym regularly and get much stronger. Alternatively, you can increase the distance from where you are applying the force to the axis of rotation. In other words, you can increase the horizontal distance from your opponents hand to their elbow. There are a few ways you can do this.;

You may already know that professional arm wrestlers are very strong. However, the techniques they use are almost as important as how strong they are. The two most common arm wrestling techniques are the hook and the top-roll.;

In the hook technique, you roll your wrist forward around your opponent’s in a “hooking” motion, which deprives them ofleverage. It also allows you to use your shoulder and back muscles to help your arm muscles.

In the top-roll technique, you rotate your wrist over the top of your opponents wrist so that your grip is higher on their hand. From there, you pull your hand towards your body to cause your opponent to lose their balance and leverage.;

Hw To Increase Torque

Torque Calculator & Formula

alokpatra said:am nt sure if am posting in the right section bcoz this is my 1st post..plz could i get help in understanding how to increase the torque of a dc motor without changing the rpm.. n how are gearboxes designed exaclty which increase torque..i basically want a mechanism 2 deliver higher torque maybe some way 2 increase torque externally to use in ROBO WARs…..

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Example 1 Muscles Exert Bigger Forces Than You Might Think

Calculate the force the biceps muscle must exert to hold the forearm and its load as shown in Figure 1, and compare this force with the weight of the forearm plus its load. You may take the data in the figure to be accurate to three significant figures.


There are four forces acting on the forearm and its load . The magnitude of the force of the biceps is FB; that of the elbow joint is FE; that of the weights of the forearm is wa, and its load is wb. Two of these are unknown , so that the first condition for equilibrium cannot by itself yield FB. But if we use the second condition and choose the pivot to be at the elbow, then the torque due to FE is zero, and the only unknown becomes FB.


The torques created by the weights are clockwise relative to the pivot, while the torque created by the biceps is counterclockwise; thus, the second condition for equilibrium ;becomes


Note that sin = 1;for all forces, since ;= 90º for all forces. This equation can easily be solved for FB in terms of known quantities, yielding


Entering the known values gives


which yields


Now, the combined weight of the arm and its load is = 63.7 N, so that the ratio of the force exerted by the biceps to the total weight is



This means that the biceps muscle is exerting a force 7.38 times the weight supported.

Torque Calculator & Formula

Torque calculator is used to find the value of torque which arises from a rotating object. Try to imagine an object which rotates around a specific point. This is the pivot point. If you happen to exert any force from a distance away from the pivot point, even though the force acts along a straight line, the object will start rotating. Lets cover details about torque, how to use this calculator, how to find torque using the torque formula, and more.

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What Is The Relationship Between Rpm And Torque

Mathematically, horsepower equals torque multiplied by rpm. H = T x rpm/5252, where H is horsepower, T is pound-feet, rpm is how fast the engine is spinning, and 5252 is a constant that makes the units jibe. So, to make more power an engine needs to generate more torque, operate at higher rpm, or both.

How To Use The Torque Calculator

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This is a simple online calculator which only requires two values for it to perform calculations. Its easy to use, accurate, and easy to understand as well. Here are the steps to follow when using this online torque calculator:

  • First, enter the value of the Distance and choose the unit of measurement from the drop-down menu.
  • Then enter the value of the Force and choose the unit of measurement from the drop-down menu.
  • After entering both values, the calculator generates the value of Torque for you automatically.

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Why Does Torque Increase As We Increase Distance From The Centre Axis


Earlier I read that as distance from centre of axis of rod increases it’s inertia increases but why does torque increases isn’t it like that if inertia increases for same force the less force should be produced?

Force is not produced; force is applied.Can you describe more clearly the scenarion you have in mind?

I want to say for same force why does more rotational effect produce

Are you familiar with mechanical advantage and as it applies to levers?

Hemant said:I want to say for same force why does more rotational effect produce

invent or definealso X torquewhyMechanical Advantage — but why? ##1 / 10## of the waybecause the fulcrum is taking most of the weight

Hemant said:when we say something is directly proportional to something then why do we multiply the to directly proportional terms for example if I say x directly proportional to y and I also say that x is also directly proportional to z then while writing the whole why do we say that the x is directly proportional to y z

Hemant said:Sir but i want to know why we multiply these terms not added nor subtracting why we multiply these without any reason.

Hemant said:when we say something is directly proportional to something then why do we multiply the to directly proportional terms for example if I say x directly proportional to y and I also say that x is also directly proportional to z then while writing the whole why do we say that the x is directly proportional to y z


Selected Solutions To Problems & Exercises

1. \begin_}&=&\text_=\text_}=\text_=\text_}=\text_=\text\\ _}& =& _}\left+_}\left\\ & =& \left\left\left\\ && +\left\left\left\\ & =& \text\end\\

3.;1.1 x;103;N,;;=;190º;ccw from positive;xaxis


7.; 25 N downward; 75 N upward

9. FA = 2.21 × 103 N;upward; FB;= 2.94 × 103 N; downward

11. ;Fteeth on bullet = 1.2 × 102 N upward FJ = 84 N downward

13.; 147 N downward; 1680 N, 3.4 times her weight; 118 J; 49.0 W

15. ; }_=\text\\ The seesaw is 3.0 m long, and hence, there is only 1.50 m of board on the other side of the pivot. The second child is off the board.; The position of the first child must be shortened, i.e. brought closer to the pivot.

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Why Torque Increases With Arm Length When Same Force Is Applied

Just want to know why the door turns less at the point closer to the hinge than at the outer point at the handle when the same force is applied. If same force is not doing same work then where the energy is lost or transferred at point A ?

When the forces are perpendicular to the arm as shown in your diagram then the work done is simply


Where $Fr$ is the torque and $r$ is the distance from the hinge to the point of application of the force $F$.

Although the displacement angle is the same for the forces at both A and B, The distance that the force at B travels along the arc is greater than the distance that the the force at A has to travel for the same angle displacement . For this reason when the forces are the same, the force at B does more work than that at A.

If the torque at A and B is the same, the forces at A and B do the same work, but less force is needed at B than A to do the same work because of the longer moment arm, $r$. The advantage of applying the same torque at B is it requires less force to do the same work, providing a mechanical advantage like a lever. Of course the force has to be applied over a greater arc length. Nothings for free.

Hope this helps.

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