Recent content by derivative_e

Thank you for the responses. Filip Larsen, I understand what you're saying. Let me ask a question about the more complicated thermodynamic model, where your system is the desk alone. You're imparting energy into the system, and - let's assume it's a symmetrical system - 1/2 the energy you...

Thanks for the responses. I'm looking to understand how forces work, so I'm going to postpone consideration of 1994Bhaskar's arguments right now. I'm looking to make sure that my understanding of forces is correct. At the beginning, when you begin moving the objects, you're doing work on them...

I'm the OP (Original Poster). 1994Bhaskar, I had no idea that the work due to friction couldn't be calculated by ukFN*d. Is there a more accurate way to calculate it? It's great that 1994Bhaskar is introducing these more advanced concepts. My background is only in basic physics, so I'm not...

Say you're pushing a heavy desk (225kg) across a carpeted floor. You either push it at 3m/s (say you applied a 675N force for 1sec, so you apply the force for 1.5m), or at 6 m/s (you applied 1350N force for 1sec, so the force is applied over 3m). After that one second impulse, however, you...