Timeline for How did tension developed in a string when two equal and opposite forces are applied on the same body?
Current License: CC BY-SA 3.0
6 events
| when toggle format | what | by | license | comment | |
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| Sep 6, 2014 at 21:29 | comment | added | garyp | The preliminary edition of Randall Knight's book. The preliminary edition was called "Physics: A Contemporary Approach". I may be unfair: I'm remembering his treatment of energy, which took a step backwards in the 1/e. The section on Forces may be ok. (My copy of 1/e has been lost.) He has a small paperback for instructors called "Five Easy Lessons" that contains condensed versions of his approach. However, I think it would serve as a great resource for students; it gives very succinct statements of physical principles without the distraction of examples, and sidebars, and colors. | |
| Sep 6, 2014 at 20:03 | comment | added | CuriousOne | Just for my interest: which book is that? Is it any good as teaching material for introductory physics? | |
| Sep 6, 2014 at 19:14 | comment | added | garyp | As a system, the rope itself must be considered to be the entire rope. You can't ask questions about what happens inside the rope without dividing it up into subsystems. To talk about tension at a point in the length of the rope, say, at the midpoint, you have to define a new system: half the rope. Then, the tension at the boundary of that system (that is, the molecule just inside the boundary of the new system) is provided by the molecules of the other rope segment, the segement that is now outside of your system. | |
| Sep 6, 2014 at 19:09 | comment | added | garyp | Your left hand pulls to the left, your right hand pulls to the right. Don't think "tension in the rope". Think "tension on the rope". | |
| Sep 6, 2014 at 18:24 | comment | added | agha rehan abbas | okay so what you are saying is tension is the pulling force itself in magnitude, but what about its direction? | |
| Sep 6, 2014 at 18:19 | history | answered | garyp | CC BY-SA 3.0 |