PHYSICS FORM 4 (FORCE AND MOTION-CHAPTER 2) 5 Study Of Linear Motion Ticker-timer 1. In the laboratory, a ticker-timer as shown in figure 2.2, with a trolley is used to study the motion of an object for a short time interval. Figure 2.2 2. A ticker-timer consists of a small electrical vibrator which vibrates at the frequency of 50 Hz. 3.