What is the period of this pendulum?

  • Thread starter Thread starter brad sue
  • Start date Start date
  • Tags Tags
    Pendulum Period
AI Thread Summary
The period of a pendulum in an accelerating elevator can be calculated using the formula T=2π√(L/(g+a)), where L is the length of the pendulum, g is the acceleration due to gravity, and a is the upward acceleration of the elevator. The user is seeking assistance to set up this equation correctly, as they are struggling with the calculations. They believe their initial approach is correct but need confirmation and guidance on how to proceed. The discussion emphasizes the importance of understanding the effects of the elevator's acceleration on the pendulum's period. Clarifying these calculations will help the user solve the problem effectively.
brad sue
Messages
270
Reaction score
0
Hi,
I have this problem:

A simple pendulum of length L is suspended from the ceiling of an elevator. The elevator is accelerating upward with acceleration a.
What is the period of this pendulum?

From logic I know that T=2pi*sqrt(L/(g+a)), but when I try to find it .. I failed.
Please can I have some help to find the period ?
 
Physics news on Phys.org
It appears to be the right thing to do. Check calculations?
 
mezarashi said:
It appears to be the right thing to do. Check calculations?

I just to help me to set up the equation .
I think I can handle the rest.

B
 
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 'Collision of a bullet on a rod-string system: query'
In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
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