Help with Error in gravity due to uncertainty in r.

AI Thread Summary
The discussion focuses on deriving an algebraic expression for the error in gravity (g) due to uncertainty in the radius (r), using limit error formulas while assuming negligible errors in gravitational constant (G) and mass (M). Participants emphasize the importance of clearly showing all steps in the calculations to identify misconceptions or errors. There is a request for users to share their attempts to facilitate better guidance. The conversation highlights the need for clarity in applying the error formula correctly. Overall, the thread aims to assist in understanding how uncertainty in r affects the calculation of gravity.
cam borrett
Messages
3
Reaction score
0

Homework Statement



Derive an algebraic expression for the error in gravity due to the uncertainty in r. Use limit error formulas and show all steps. Assume that errors in G and M are negligible.

Homework Equations


g=GM/r^2

The Attempt at a Solution


[/B]
i use the error formula but not sure about what the input for what...
 
Physics news on Phys.org
cam borrett said:
i use the error formula but not sure about what the input for what...

Show us what you did. It is the absolutely easiest way for us to identify where you are going wrong or where your misconception lies.
 

Thread 'Errors and significant figures'

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...
View full post »
Thread 'A cylinder connected to a hanging mass'

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...
View full post »

Similar threads

What are the uncertainty values for my corrected magnitudes?
Replies
2
Views
1K
Uncertainty Error and Significant Figures in this Force Tables Lab
Replies
4
Views
2K
Understanding the Proper Uncertainty Formula to Use
Replies
4
Views
901
Combining Multiple Rules for Error Propagation
Replies
3
Views
2K
When Do I Use Reading Error in Measurement Uncertainty?
Replies
8
Views
2K
Error Calculation for a Diffraction Grating's Performance
Replies
6
Views
5K
Uncertainty/error of a volume is greater than the normal volume
Replies
4
Views
1K
Finding the uncertainty in delta y?
Replies
2
Views
2K
What is the uncertainty in 5.00mm measured by analog device?
Replies
1
Views
1K
How do I determine the uncertainty value of the star's absolute magnitude?
Replies
6
Views
3K

Hot Threads

Recent Insights

Back
Top