pendulum

1. Compound pendulum

a compound pendulum is formed by suspending a heavy ring from a point on its circumference . determine the time period of oscillation of radius of the ring is 1m. Time period T =2π √I/mgl I took I= mR^2/2 and l=r which gave me an answer of 1.41s . But the actual answer is 1.28s what am I...
2. Rotational Power = torque (τ)*(ω) angular velocity? - Problem with units

I set up an experiment with a pendulum (uniform beam) swinging on a hinge and the hinge attached to a small PMDC generator. The generator had no load attached and its output voltage is proportional to its speed of rotation. I swung the pendulum from 90 degrees and using a data logger I...
3. What are the collision forces applied to the stops in a moving triple pendulum?

Hello, it's been a while since I did not use lagrangian mechanics and all this stuff and would bet it's needed for my purpose. Introduction : if I take a simple pendulum and make it collide on its origin with a stop, how much will suffer the stop ? Knowing that the pendulum is subject to an...
4. pendulum question

Hi guys, A bullet of mass 25 grams and travelling horizontally at a speed of 200 m/s imbeds itself in a wooden block of mass 5kg suspended from a chord 3 m long. How far will the block swing from its position of rest before beginning to return. so, the bullet has a momentum = mv = 0.025...
5. Flywheel Inverted pendulum torque calculation

I started building my own flywheel inverted pendulum (i'm using a standard PID controller for the balancing). I came across many articles regarding the differential equation of the pendulum. Most article develop the motion equation using the Euler–Lagrange, few chose the Newtonian way. What I...
6. Pendulum Pivot Max Force Calc

Hey Guys, I recently built a Reverse Hyper, picture attached, for my home gym. It's a basic pendulum on which weight is added. It currently utilizes 2 - 5/8'' pillow block bearings for the pivot. Each are rated to ~6.25 KN. Can anyone provide me with the equations or reference material...
7. Pendulum Pivot Max Force Calc

Hey Peeps, I recently built a Reverse Hyper, picture attached, for my home gym. It's a basic pendulum on which weight is added. It currently utilizes 2 - 5/8'' pillow block bearings for the pivot. Each are rated to ~6.25 KN. Can anyone provide me with the equations or reference material...
8. Pendulum Problem

A simple pendulum has a period of 3 seconds on Earth. If it is taken to Planet X, which has the same mass as Earth but a radius of 0.5 the size of Earth's radius, the new period will be what? I am using T^2/r^3 = Constant to solve for T(x) but I don't think I'm getting the correct answer...
9. I need help with a Rigid Pendulum Calculation please

I have a rigid body pendulum that is used to strike an object at the bottom of its swing. Ultimately I would like to know how much forced is the object being struck with. Could I do this with just knowing the velocity of the weight? I was thinking then I could get P=MV. Can someone please help e...
10. Pendulum impact force

Hi, I'm trying to figure out the impact force of a pendulum at its max speed. My take on this is to use 2 equations: Everything here is known except the velocity v Potential/Kinetic energy m*g*h=1/2*m*v^2 which for a pendulum can be written v=sqrt(2*g*L*(1-cos(theta)) Impact force F=m*Delta...
11. I need someone hel pto clarify my problem

Question: A student used a digital stopwatch three time 10 oscillations of a pendulum. The timings were 13.52s, 13.64s and 13.58s a) Calculate i the average time for 10 oscillations, ii the time period of the oscillations. b) Estimate the accuracy of the timings, giving a reason for your...
12. Compound pendulum Experiment

Hello I am trying to work out the acceleration due to gravity using compound pendulum method. However I am totally stumped and don't understand how you find it using this method,I am able to carry out the experiment properly. I am just confused about how you use the graph to find the value of...
13. Help with free body diagram for a pendulum

I wrote the summation of forces perpendicular to the inverted pendulum and the summation of the moments about the centroid of the pendulum. I am not sure if they are right (especially the signs) and was wondering if someone could check
14. Length of the pendulum which has the same period?

can anyone show me how to get the ans ? i couldnt understand the question. your help is much appreciated!
15. Kinetic energy (spehrical pendulum)

This is not a homework problem. I am refreshing on Analytical mechanics. Question: Consider the spherical pendulum, which consists of a mass m suspended by a string from the ceiling. The mass is free to swing in both directions but maintains a constant distance from the point of suspension...
16. Inverted pendulum

Hi, I'm not sure this is the correct place for this. I am taking my first Physics course in about 40 years, Computational Physics with the Garcia textbook, "Numerical Methods for Physics". Problem 21 attached deals with an inverted pendulum. I have included a scan of the problem and my...
17. Pendulum problem

Mass m=1kg is hung to a string (not elastic). The pendulum begins to oscillate angular amplitude alfa=pi/3 and period T=pi/sqrt(2) s. a) Calculate the maximum magnitude of the velocity of the mass while it is oscillating b)The limits within the tension in the spring varies during the...
18. Two-ish problems(1 pendulum and 1 force problem)

So, I have a test tomorrow, and I just need help with these two problems. I honestly don't know what to do, although, I'm sure if I had the equations I could figure it out. I know the answers for everything so I can check it that way. 1) A 5N force acts on a 2kg object moving with a speed of...
19. Simple pendulum problems

1. Why both L of left hand and right hand figures are different? 2. Why mg is put on the right end, not middle of the bar, in the right hand figure?
20. Pendulum and Pin issue

Hello, everyone! I've been given an issue from my colleagues, and I need some help. It's about a particle attached to a string and a particle with a "d" distance underneath the place where the article is attached. My question is, how should I start solving this issue? Is it really an energy...