Two masses on each end of a spring lying horizontally

Thread starter James Ray
Start date May 18, 2016
Tags

Spring Two masses

May 18, 2016

James Ray

Homework Statement

Homework Equations

T= 2*pi*sqrt(m/k)
U=1/2*k*x^2

The Attempt at a Solution

https://www.physicsforums.com/attachments/100892,

[/B]

Last edited: May 18, 2016

Physics news on Phys.org

May 18, 2016

ehild

Science Advisor

Homework Helper

Would you please explain your scribble? please type in your answer and work.

May 18, 2016

haruspex

Science Advisor

Homework Helper

Insights Author

Gold Member

2024 Award

James, by how much was the spring extended?

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'

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 »

Thread 'Explain this asphalt sheen'

This problem is two parts. The first is to determine what effects are being provided by each of the elements - 1) the window panes; 2) the asphalt surface. My answer to that is The second part of the problem is exactly why you get this affect. And one more spoiler:

View full post »