Modes of operation Primary Mode Front Time Dark Time Speed Period Pendulum Period Secondary Modes Previous Value Previous Value Previous Value Mean Period Mean Pend. Period Interval Before Interval Before Interval Before Mean Frequency Mean Pend. Freq. Interval After Interval After Interval After Counts Period Count Front Time: The time it takes the front edge of an object to pass from one light beam to the other Dark Time: The time the object blocks one of the light beams Speed: Measured as distance between light beams divided by Front Time Period: Time between the current and the previous blocking of a light beam Pendulum Period: Like Period but drops every other passage Interval Before: A signal from another SpeedGate starts the time interval, blocking a light beam stops it Interval After: Blocking a light beam starts the time interval, a signal from another SpeedGate stops it Many of these functions can also be used with external equipment connected to the Aux input. Lab activities This is only a few of the numerous applications for this versatile tool: Kinematics of uniformly accelerated motion The free fall Newton’s second law One-dimensional elastic and inelastic collisions The mathematical pendulum The speed of sound (with two 248600 microphones) Front Time Frederiksen Scientific A/S Viaduktvej 35 . DK-6870 Ølgod Tel. +45 7524 4966 Fax +45 7524 6282 info@frederiksen.eu www.frederiksen.eu Afd. Aarhus: Samsøvej 21 DK-8382 Hinnerup
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