Archived Problem 6 Vrms Formula: Mass in kg?

  • Thread starter Thread starter microsd
  • Start date Start date
  • Tags Tags
    Formula Mass
AI Thread Summary
The discussion centers on the Vrms formula, specifically questioning whether mass must be expressed in kilograms due to the use of Joules (J) in the formula. Vrms refers to root-mean-square speed, which is a statistical measure of the speed of particles in a system. Joules, the unit of energy, is defined in terms of kilograms, indicating that mass should indeed be in kilograms for consistency. Participants highlight the importance of having access to the same textbook for clarity. Understanding these concepts is crucial for solving related physics problems effectively.
microsd
Messages
2
Reaction score
0
On problem #6, when using the Vrms formula, does the mass have to be in kg because the constant used uses J, which is kg?
 
Physics news on Phys.org
What on Earth is the Vrms formula, and what is J?

Are you aware that the rest of us do not have your textbook, or if we do, it is not opened to the same page you are on?
 
Vrms is root-mean-square speed and J is Joule.
 
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