What is the Change in Potential Energy of a Displaced Meter Scale?

AI Thread Summary
The discussion focuses on calculating the change in potential energy of a meter scale displaced at a 45-degree angle while keeping the upper end fixed. The relevant equation for potential energy change is mass times gravitational acceleration times the change in height. The change in height is derived as (l/2)(1-cos45). Participants emphasize the importance of considering the center of mass and suggest breaking down the problem into x and y components for clarity. Ultimately, the solution is reached through collaborative problem-solving and visual aids.
sylwesh98
Messages
42
Reaction score
0
A meter scale of mass m initially vertical is displaced at 45 degrees keeping the upper end fixed.
. find out the change in potential energy.
 
Physics news on Phys.org
Found it. What is your attempt at a solution? And what are the relevant equations ?
 
change in potential energy=mass*acceleration due to gravity * change in height
I can't get the change in height
here change in height is given as (l/2)(1-cos45)
Can u tell me sir!
 
Try making a drawing. Remember that it's the change in height of the centre of mass that matters.
 
I want to say, that I think you have to break it down into its x and y components
 
sir i got it !
 

Attachments

  • maxresdefault.jpg
    maxresdefault.jpg
    49.3 KB · Views: 371

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

Electric Potential Energy of Point Charge Systems
Replies
2
Views
883
Is potential energy defined only for internal conservative forces?
Replies
15
Views
1K
Distribution of Energy when work is done on a system of 2 masses connected by a spring
Replies
17
Views
1K
Graphing Elastic Potential Energy
Replies
10
Views
2K
Help finding the change in potential energy in this problem
Replies
9
Views
757
Velocity of two masses due to electric potential energy
Replies
3
Views
2K
Force components for mass attached to two springs
Replies
15
Views
1K
Misunderstanding of Gravitational Potential Energy
Replies
7
Views
3K
Energy of a water tank with compressed air
Replies
5
Views
1K
Challenging problem about an impact with a smooth frictionless surface
2
Replies
55
Views
5K

Hot Threads

Recent Insights

Back
Top