Ping-pong ball anemometers A common anemometer for basic use is constructed from a ping-pong ball attached to a string. When the wind blows horizontally, it presses on and moves the ball; because ping-pong balls are very lightweight, they move easily in light winds. Measuring the angle between the string-ball apparatus and the vertical gives an estimate of the wind speed.
Ping-pong ball anemometers A common anemometer for basic use is constructed from a ping-pong ball attached to a string When the wind blows horizontally it presses on and moves the ball; because ping-pong balls are very lightweight they move easily in light winds Measuring the angle between the string-ball apparatus and the vertical gives an estimate of the wind speed