Timeline for Cylinder attached to block rotational dynamics problem gives different answers when using different method
Current License: CC BY-SA 4.0
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Dec 10, 2023 at 19:34 | comment | added | Piyush Lath | Whenever a body is rolling such that its contact point is not slipping, then work done by friction on the body is zero because while there is frictional force being exerted at the contact points, they are at rest at any point of time and so by definition friction does not do any work. I chose the axis at the bottom one because frictional force passes through it and so torque of frictional force about it is zero. So, we would not need to find frictional force. Comment for clarifications. | |
Dec 10, 2023 at 19:21 | comment | added | Dollar Store Richard | Thanks for your answer! I'm still a little confused as to when you are supposed to change the pivot point to solve rolling problems, and the implications of doing so. Does it change anything aside from Newton's second law (and the respective torques applied)? And one last thing, wouldn't the solution involving the WEP include the work rolling friction did (which another answer included in their solution)? | |
Dec 10, 2023 at 17:33 | history | answered | Piyush Lath | CC BY-SA 4.0 |