Car moving up Inclined Plane question

AI Thread Summary
The discussion revolves around calculating the work done by a car moving up an inclined plane, focusing on the relationship between potential energy (PE), kinetic energy (KE), and energy lost to friction. The original poster is uncertain about the correct approach to include friction in their calculations, particularly whether it should be expressed in terms of heat. They emphasize that the work performed by a force is determined by the force's magnitude and the distance moved in its direction. The conversation highlights the complexities of energy transformations in this scenario. Overall, the key concern is accurately accounting for energy losses due to friction in the calculations.
Ronaldo95163
Messages
77
Reaction score
1
My question and attempted solution are in the pics below...not sure if what I did was correct though :/

I was thinking that the work done would have been equal to PE+Change in KE + Energy Lost to friction...but not sure how to calculate the energy lost to friction as I'm not sure if it has to be calculated in a specific form eg heat
 

Attachments

  • IMG_20140309_004331.jpg
    IMG_20140309_004331.jpg
    42.1 KB · Views: 555
  • IMG_20140309_004223.jpg
    IMG_20140309_004223.jpg
    40.4 KB · Views: 546
Last edited:
Physics news on Phys.org
Work performed by a force = magnitude of the force x distance moved in the precise direction of that force. The energy expended will probably mostly end up as heat, but that is not important here.
 
Thread 'Collision of a bullet on a rod-string system: query'
In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
Thread 'A cylinder connected to a hanged mass'
Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
Back
Top