GIPHOTOSTOCK / SCIENCE PHOTO LIBRARY GIPHOTOSTOCK / SCIENCE PHOTO LIBRARY
A demonstration of physical pendulum using a wooden ruler. The swing of the pendulum starts on the right. At the end of the swing (on the left) the pendulum does not come up as high. This is because some energy is lost due to friction. Stroboscopic image acquired using a flash operating at 40 Hz.
Model release not required. Property release not required.