Ticker Tape
The ticker tape can be used to study
linear motion.
The tape is usually attached to, and pulled by, a moving trolley.
The analysis of the tape enables one to better understand the motion
of the trolley. From the frequency of the ticker tape, one can get
the time.
From the lengths between the dots, the distance travelled by the
trolley in the known time can be measured. Using
the two quantities (distance and time), velocity
can be calculated - and from it. acceleration
can be derived.
For example, in the example above, with a frequency of 50Hz, the time between two dots is
1/50Hz = 0.02s
The final velocity can be calculated as such
5cm/0.02s = 250cm/s
The initial velocity can be calculated as such
2cm/0.02s = 100cm/s
The time between the final velocity and initial velocity is 5 X 0.02s = 0.1s
Thus, the acceleration of the trolley can be calculated as
final velocity - initial velocity
time
= 250cm/s - 100cm/s
0.1s
= 1500cm/s2
= 1.5 m/s2
For example, in the example above, with a frequency of 50Hz, the time between two dots is
1/50Hz = 0.02s
The final velocity can be calculated as such
5cm/0.02s = 250cm/s
The initial velocity can be calculated as such
2cm/0.02s = 100cm/s
The time between the final velocity and initial velocity is 5 X 0.02s = 0.1s
Thus, the acceleration of the trolley can be calculated as
final velocity - initial velocity
time
= 250cm/s - 100cm/s
0.1s
= 1500cm/s2
= 1.5 m/s2
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