Solved: Significant Digits - Multi-Equation Answers

  • Thread starter Thread starter Linday12
  • Start date Start date
  • Tags Tags
    Significant digits
AI Thread Summary
When solving multi-equation problems involving significant digits, it is recommended to avoid rounding intermediate results until the final answer is calculated. This ensures greater accuracy in the final result. Users can utilize calculators that allow storing values to letters, which can help maintain precision throughout the calculations. Keeping intermediate values long until the end is crucial for obtaining the correct significant digits in the final answer. Overall, maintaining precision until the conclusion of the calculations is essential for accuracy.
Linday12
Messages
53
Reaction score
0
[SOLVED] Significant Digits

I know how to do significant digits, but was wondering about answers involving multiple equations. If I find acceleration first, then find net force, should I wait to round the answer until the end?

a=vf-vi/t and then fnet=ma

To reiterate, should I keep acceleration long, or round it to complete the group of equations above?

Thank you very much!
 
Physics news on Phys.org
Don't round off till the end!

Are you able to store values to letters on your calculator? I would suggest doing that if you can.
 
Yeah. Thanks a lot, I'll make sure to do that.
 
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