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# How do you calculate torque needed to rotate a mass?

## How do you calculate torque needed to rotate a mass?

To calculate load torque, multiply the force (F) by the distance away from the rotational axis, which is the radius of the pulley (r). If the mass of the load (blue box) is 20 Newtons, and the radius of the pulley is 5 cm away, then the required torque for the application is 20 N x 0.05 m = 1 Nm.

### How do you calculate rotating mass?

1. Find the mass of the object – for example, 10 kg .
2. Determine the radius of rotation. Let’s assume it’s 2 m .
3. Determine the velocity of the object. It can be equal to 5 m/s .
4. Use the centrifugal force equation: F = m v² / r .
5. Or you can just input the data into our calculator instead 🙂

How do you calculate the power needed to rotate a wheel?

To find the required power, divide that energy by the time given and you will have Joules/sec, the unit of power equal to a Watt. Then just convert to HP.

How can we calculate the required torque to rotate 1200 kg of mass?

In your case J = Ms*D^2/8 + 1200*r^2 + Jg, D = Shaft dia, Ms = mass of shaft, r = distance of CG of the attached mass from the centre of rotation, Jg = MI of the attached mass about an axis through its CG and parallel to the axis of rotation.

## What is rotating mass?

A rotating mass, or rotor, is said to be out of balance when its center of mass (inertia axis) is out of alignment with the center of rotation (geometric axis). Unbalance causes a moment which gives the rotor a wobbling movement characteristic of vibration of rotating structures.

### Does mass affect tangential acceleration?

Angular acceleration is inversely proportional to mass.

How do you calculate power from torque?

1. Torque (lb.in) = 63,025 x Power (HP) / Speed (RPM)
2. Power (HP) = Torque (lb.in) x Speed (RPM) / 63,025.
3. Torque (N.m) = 9.5488 x Power (kW) / Speed (RPM)
4. Power (kW) = Torque (N.m) x Speed (RPM) / 9.5488.

How do you calculate mass torque?

The equation τ = m(r^2)α is the rotational analog of Newton’s second law (F=ma), where torque is analogous to force, angular acceleration is analogous to translational acceleration, and mr2 is analogous to mass (or inertia ).

I would like to calculate torque to rotate 1200 kg of mass which is attached in 1.5″ dia shaft. Shaft is supported by 2 bearings at its end. Neglect bearing frication. Please help. Join ResearchGate to ask questions, get input, and advance your work.

## How to calculate the power required to rotate flywheel?

Also there is a problem with your units: 4.5kg is mass, not weight. If you provide time required to bring flywheel to 100 rpm, then power can be calculated. Starting it, you could apply any amount of power. If that is above the static friction, it will start rotating.

### How does change in rotating mass affect acceleration and power?

Rotating Mass, Available Horsepower, and Acceleration How change in rotating weight affects acceleration and power. We see or experience centrifugal force and inertia every day of our lives, and intuitively know how it works. One of the best examples is twirling a rope with a weight on the end.

How much torque do you need to rotate a system?

The needed torque then depends on the moment of inertia. From my understanding, however, if you neglect friction you only need a torque abs(M) > 0 to rotate your system because there is no constraint that prevents the motion.