An economical timer is ideal for determining the rate of acceleration in a falling weight, calculating the speed of a moving cart or studying the forces of friction. A paper strip is pulled through the timer by the object being measured while a series of sparks at precise intervals are generated. The sparks burn tiny dots into the paper strip as it passes. The faster the strip passes through the timer, the larger the distance between the dots. It is easy then for the student to calculate the speed and acceleration. As an added benefit, everything on the spark timer is enclosed for safety. Included is a roll of spark timer paper, a replacement electrode and a free fall weight. With cord and plug for 110VAC operation. Not available for sale in Canada.
(
;){kind=link}