Torque Calculation

Sounds like a homework assignment. If so please read the rules for posting messages.

Do your own homework. CR4 is not a homework cheat site. While some here might relish the opportunity to sharpen up old rusty skills by working the homework problem, consider the following and consider it well. If you cheat on your homework by using someone else's answers, you are only cheating yourself, because the purpose of any homework or other academic assignments is to help you learn - by practice, repetition, and self-discovery.

T = F x D

T = torque (in lb-ft)

F = force (in lb)

D = distance (in ft)


Relationship between force F, torque τ,linear momentum p, and angular momentumL in a system which has rotation constrained in one plane only (forces and moments due to gravity and friction not considered).


http://en.wikipedia.org/wiki/Torque

F = m x a.
Force = Mass multiplied by Acceleration....
The SI unit of mass is kg and that of acceleration is m/s2 (meters per second squared). So when mass and acceleration are expressed in their SI units, we get the force in its SI units which is N (Newtons)......
Keep in mind that weight and mass mean different in Physics. If the weight of an object is given in N (Newtons) then it may be divided by 9.8 to get the equivalent mass.

For example, 10 N weight is equivalent to 10/9.8 = 1.02 kg mass

• The definition of a Newton, the standard unit of force, is N = kg * m/s^2.

it's "degrees"

There's a fee for that.

Since the disk was already rotating at 28 1/3 RPM it will take zero torque with ideal bearings. I leave it to the student to derive and explain the equation.

Is the disk initially at rest?

Is the disk uniform in its mass distribution?

Initial conditions?

Final conditions? Do we have to stop it at 340deg?

Formulas for torque, inertia, wk^2 etc are standard - do you really need them to be given to you?

Kinda scary, you've joined CR4 almost 5 years ago and yet your still asking basic homework questions. Please tell us what school/ college you attend, so we may either steer clear of, or re-evaluate graduates from there.