Net torque Need help with angular acceleration.

• zelli
In summary, the angular acceleration can be calculated using the formula dW/dT and the net torque can be calculated by multiplying the angular acceleration by the rotational inertia. The final angle can be determined using the equation Θf = Θi + (Wi)(dT) + 1/2(α)(Δt^2). Additionally, the formula (wf)^2 - (w0)^2 = 2αω can be used to find the net torque when the angular velocity and angular acceleration are known.
zelli

Homework Statement

A certain wheel has a rotational inertia of 12 kg m2. As it turns through 5.0 rev its angular velocity increases from 5.0 rad/s to 6.0 rad/s. If the net torque is constant, its value is:

Homework Equations

Angular acceleration = dW/dT
Net torque = (angular acceleration)*(rotational inertia)
Θf = Θi + (Wi)(dT) + $$\frac{1}{2}$$ $$\alpha$$$$\Delta$$t2

The Attempt at a Solution

I am confused on how to find dT. The equations have have both have two unknowns (t & $$\alpha$$)

Last edited:
why don't you try this formula:

(wf)^2 - (w0)^2 = 2 alpha * omega.

Thank you so much! That worked. I'm glad you had that equation. I did not, and it happened to be on the test.
!

1. What is net torque?

Net torque is a measure of the overall rotational force acting on an object. It is the sum of all individual torques acting on the object.

2. How is net torque calculated?

Net torque is calculated by multiplying the force acting on an object by its distance from the axis of rotation. The direction of the torque is determined by the direction of the force and the direction of rotation.

3. What is angular acceleration?

Angular acceleration is the rate of change of an object's angular velocity. It is a measure of how quickly the object is accelerating or decelerating in its rotational motion.

4. How is angular acceleration related to net torque?

Angular acceleration is directly proportional to the net torque acting on an object. The greater the net torque, the greater the angular acceleration will be.

5. How can I calculate angular acceleration from net torque?

You can calculate angular acceleration by dividing the net torque by the moment of inertia of the object. The moment of inertia is a measure of an object's resistance to rotational motion.

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