the acceleration. Background Information Since a bell-clapper vibrated at regular intervals of time, it can be used as a timing device. With the aid of carbon paper and ticker-tape, the position of an object relative to time can be determined. Figure 1 shows a sample of a tape drawn through the bell-clapper. a b Figure 1. During what interval was the velocity constant? a cnd b Instead of using a time unit of only one vibration, we might use five vibrations, a penta-tick. During what interval was the acceleration greatest? What is the distance traveled during the first penta-tick? 75cm X If we know distance and time, then we know the speed. Therefore the average speed traveled during the first penta-tick is during the second penta-tick is Equipment

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Special Relativity

The theory of special relativity discusses how space and time are related to objects traveling along a straight line at a constant speed. Simply stated, as an object reaches the speed of light, its mass becomes infinite and it is unable to move faster than light. This interstellar speed limit has been the topic of much debate in astronomy, and also in science fiction when people consider how to fly over large distances.