Finding Velocity

Velocity of a motion can be determined by using ticker tape through the following equation:

Caution!:

t is time taken from the first dot to the last dot of the distance measured.

Example 1

Diagram 2.4 shows a strip of ticker tape that was pulled through a ticker tape timer that vibrated at 50 times a second. What is the

a. time taken from the first dot to the last dot?

b. average velocity of the object that is represented by the ticker tape?

Answer:

a. There are 15 ticks from the first dot to the last dot, hence

Time taken = 15 × 0.02s = 0.3s

b. Distance travelled = 15cm

\[v = \frac{s}{t} \hfill \\ \]

\[v = \frac{{15cm}}{{0.3s}} = 50cms^{ - 1} \hfill \\ \]

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