Net Force on 1.6t Car on 40o Banked Icy Road

  • Thread starter Thread starter chem_is_lovex
  • Start date Start date
  • Tags Tags
    Force Ramp
AI Thread Summary
The discussion focuses on calculating the net force acting on a 1.6-ton car parked on a 40-degree banked icy road, where friction is negligible. The initial attempt at a solution involves using the equation Fd = mgsin(θ), but the result is incorrect. A participant points out potential issues with unit conversions, specifically the need to express the weight in kilograms for consistency with the mks system. Emphasizing the importance of maintaining proper units throughout calculations is highlighted. The conversation underscores the significance of unit accuracy in physics problems.
chem_is_lovex
Messages
30
Reaction score
0

Homework Statement


what is the net force acting on a 1.6t car initially parked on a smooth icy road banked at 40o. (frictional forces are negligible)


Homework Equations


Fd=mgsin\theta


The Attempt at a Solution


I'm not too sure.
1600 x 9.8 x sin40

but it = the wrong number?? help!
 
Physics news on Phys.org
chem_is_lovex said:

Homework Statement


what is the net force acting on a 1.6t car initially parked on a smooth icy road banked at 40o. (frictional forces are negligible)


Homework Equations


Fd=mgsin\theta


The Attempt at a Solution


I'm not too sure.
1600 x 9.8 x sin40

but it = the wrong number?? help!

I believe you at least have a problem with units. What is the "ton" thing in terms of mks units? It's good to get in the habit of carrying units along in your equations, and multiplying and dividing them out just like you are doing with the numbers. If you are calculating a force in mks units, the answer's units had better be in kg*m/s^2, right?
 
I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
Thread 'A cylinder connected to a hanging 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