Page 130 - SCIENCE DLP T6 SK (SEMAKAN 2017)

My Speed

Aim: To define operationally the speed of an individual
Apparatus and materials: stopwatches, pencil, paper
Steps:
1. Carry out a running activity on the school field.
2. Appoint four members of the group as timekeepers and one member
as a runner.
3. The timekeepers will be at station A, station B, station C, and station D
respectively as shown in the picture.

station D
50m

starting finishing station C
line line

50m

50m 50m
station A station B
4. The runner will start running from the starting line to the finishing line.
5. All the timekeepers will start their stopwatches when the running starts.
6. The timekeepers will stop their stopwatches when the runner passes by their
respective station.
7. Record the stopwatch readings in the table.
Station Distance (m) Time (s)
A 50

B 100

C 150
D 200

8. Make a bar chart based on the table.
9. Present the results of your group.

Questions:
1. Is the speed of the runner at each station the same? Why?
2. State the manipulated variable and the responding variable.
3. What is the operational definition of speed in this activity?
4. If the runner keeps running for 400 m, predict the runner’s speed.
Explain your answer.

7.1.4,
122 7.1.5

8.2.6
8.2.7