| ??? 03/19/07 03:22 Read: times |
#135239 - Newton's second law Responding to: ???'s previous message |
Steve said:
Mehdi. Weight is NOT the issue, its moment of inertia - the resistance of an object to being TURNED. In rotational terms, torque = J dw/dt, where J is the moment of inertia and w is angular velocity, so dw/dt is angular acceleration. You NEED to know the moment of inertia, if the load is a flat disc, its easy, its (mass x r^2)/2 Thank you Steve By Newton's second law for linear motion, if we apply a force F to the particle, then F = m a .we multiply both sides of the equation by r . Then T = F r = m r a .Finally, we use the equation derived about, to convert from linear acceleration to angular acceleration:T = m r a = m r (A r ). Rearranging terms gives the desired formula T = (m r ^2) A. as you said above to calculating moment of inertia of a flat disc, mass is a factor,and for any shape of load mass is a factor too,but it enters to formula by integral function, anyway,what is the best motor choice for this application? |
| Topic | Author | Date |
| What is the best motor choice? | 01/01/70 00:00 | |
| Motor | 01/01/70 00:00 | |
| The Load is so heavy in this case | 01/01/70 00:00 | |
| Moments of inertia. | 01/01/70 00:00 | |
| Newton's second law | 01/01/70 00:00 | |
| MI | 01/01/70 00:00 | |
| Nice rendition of physics 101, first week... | 01/01/70 00:00 | |
| uh...I mean... | 01/01/70 00:00 | |
Actually, you can do it yourself... | 01/01/70 00:00 |