Torque and tangential velocity

[Josielle Abdilla]

What is the moment of inertia and what relationship does it have to do with the torque. I have advanced physics

 

[sophiecentaur]

Force = Mass times Acceleration
goes to
Torque = MI times Angular Acceleration

 

[Josielle Abdilla]

thanks a lot! Can you please give the definition of moment of inertia?

 

[sophiecentaur]

I think it would be less trouble for you to look that up on Wiki than for me to write it down, aamof. You do have "advanced physics" , after all.
Actually, there is a use for Moment of Inertia in the strength of structures, too - but one thing at a time, perhaps.

 

[Josielle Abdilla]

Hi..Does anyone know why torque is responsible for a change in the tangential velocity and thus the angular velocity i.e. there is angular acceleration. I know that there is an equation to prove this but I don't know why exactly Besides that, why does the moment of inertia offer opposition to the torque? Thanks to all of you who are willing to help me

 

[anorlunda]

Thanks to all of you who are willing to help me

I think the best help is to point out that asking random questions like that is a poor learning strategy. It gives you fragmented knowledge. Soon you'll find that you're missing another fragment and another.

That is why courses start with textbooks and lectures, rather than just putting the teacher up front to answer questions. You can also learn much from the universally available Wikipedia or online video courses.

 

[osilmag]

Hi..Does anyone know why torque is responsible for a change in the tangential velocity and thus the angular velocity i.e. there is angular acceleration. I know that there is an equation to prove this but I don't know why exactly Besides that, why does the moment of inertia offer opposition to the torque? Thanks to all of you who are willing to help me

Torque is defined as twisting force. So, the object that it is acting on will turn/twist which gives said object an angular velocity.

 

[CWatters]

The Mass of an object is what gives it inertia (reluctance to change linear velocity).

The Moment of Inertia can be thought of as doing the same thing for rotation (eg reluctance to change angular velocity). The MOI depends on an objects mass and the arrangement of that mass in relation to the axis of rotation. The arrangement of the mass is important because the further it is from the axis of rotation the greater is the tangential acceleration in response to a constant angular acceleration.