Diagram 2 shows the same boy coming down a high hillock along a track. The track is much steeper causing him to come down very fast.
Rajah 1 menunjukkan seorang budak lelaki sedang menunggang basikalnya di sepanjang satu trek tanah. Apabila budak itu melalui satu timbunan tanah rendah, dia menuruni timbunan itu dengan perlahan.
Rajah 2 menunjukkan seorang budak lelaki yang sama menuruni satu timbuanan tanah yang tinggi pada trek tersebut. Trek itu adalah lebih curam dan menyebabkannya bergerak turun dengan laju.
Based on the information and observation:
Berdasarkan maklumat dan pemerhatian:
(a) state one suitable inference that can be made.
Nyatakan satu inferens yang sesuai.
(b) State one appropriate hypothesis for an investigation.
Nyatakan satu hipotesis yang sesuai.
(c) with the use of apparatus such as trolley, ticker timer, ticker tape and other apparatus, describe one experiment to investigate the hypothesis stated in (b).
Dengan menggunakan radas seperti troli, jangka masa detik, pita detik dan lain-lain radas, terangkan satu eksperimen untuk menyiasat hipotesis yang dinyatakan di (b).
In your description, state clearly the following:
Dalam penerangan anda, nyatakan dengan jelas perkara berikut:
(i) The aim of the experiment
Tujuan eksperimen
(ii) The variables in the experiment
Pembolehubah dalam eksperimen
(iii)The list of apparatus and materials
Senarai radas dan bahan.
(iV) The arrangement of the apparatus.
Susunan radas.
(v) The procedure of the experiment which should include one of the method of controlling the manipulated variable and one method of measuring the responding variable.
Prosedur eksperimen yang mesti termasuk satu kaedah mengawal pembolehubah dimanipulasikan dan satu kaedah mengukur pembolehubah bergerak balas.
(vi) The way to tabulate data.
Cara untuk menjadualkan data.
(vii) The way to analyse the data.
Cara untuk menganalisis data.
Answer:
Interference :
Velocity depends on the height of the track (hillock)
Hypothesis
The greater the height, the larger the velocity
Aim:
To study the relationship between the height and the velocity
list of variable :
Manipulated variable : height ( of track),h/number of similar wooden blocks
Responding variables : velocity, v
Fixed variable : length ( of track ), mass ( of trolley )
List of apparatus : Metre rule, a.c power supply, ticker tape, ticker time, trolley and track
Arrangement of apparatus:
The procedure of experiment:
Set the track so that the height of track, h= 15.0 cm
Switch on the power supply and allow the trolley to come down the track. calculate the velocity, v ( of the trolley) from the ticker tape.
V=s/t
Repeat steps 2 and 3 for h = 20.0 cm. 25.0 cm, 30.0 cm and 35.0 cm
Tabulation of data :
Analysing data:
Plot the graph of velocity, v against height, h