Skip Navigation
Search
- Sections
- A. General Materials & Mathematics
- B. Statics
- C. Kinematics & Dynamics
- D. Rotational Mechanics
- E. Gravitation & Astronomy
- F. Fluid Mechanics
- G. Vibrations & Mechanical Waves
- H. Sound
- I. Thermodynamics
- J. Electrostatics & Magnetostatics
- K. Electromagnetic Principles
- L. Geometrical Optics
- M. Wave Optics
- N. Spectra & Color
- O. Vision
- P. Modern Physics
Pendulum With Force Scale
Purpose
To show the tension in the string exerted by a swinging pendulum.
Equipment
Pendulum with bifilar support, 40 N spring scale, 22 N (5 lb) weight.
Images
Description
The spring scale reads the tension in the string as the pendulum swings, about 25 Newtons at the center and 19 Newtons at the ends of the swing with a bob mass of 1.1 kG. In this setup:◙F (center) = mg + mrw^2 = mg (3 - 2 cos a) ◙F(end) = mg cos a ◙where by conservation of energy ◙m v^2 /2 = m r^2 w^2 /2 = mgr (1 - cos a) ◙m r w^2 = 2mg ( 1 - cos a)
-
See pagesg1. simple harmonic motion
-
See pagesg2. resonance & coupled oscillations
-
See pagesg3. mechanical waves one dimensional
-
See pagesg4. mechanical waves two dimensional
-
See pagesg1. simple harmonic motion
-
See pagesg2. resonance & coupled oscillations
-
See pagesg3. mechanical waves one dimensional
-
See pagesg4. mechanical waves two dimensional
Physics Lab Demos