Tugasan 2.5.1 Anda dikehendaki menjalankan eksperimen untuk mengkaji hubungan antara jisim dengan pecutan sebuah troli menggunakan jangkamasa detik.Seterusnya, anda dikehendaki menyediaka laporan eksperimen yang mengandungi : You are required to conduct an experiment to study the relationship between the mass and the acceleration of a trolley by using ticker timer. Then, you are required to prepare the report of experiment which has : Inferens Inference Hipotesis Hypothesis Tujuan Aim Pemboleh ubah Variables i. Pemboleh ubah dimanipulasi Manipulated variable ii. Pemboleh ubah bergerak balas Responding variable iii. Pemboleh ubah dimalarkan Constant variable Radas dan bahan Apparatus and material Susunan radas dan bahan Arrangement of apparatus and material Prosedur Procedure Keputusan eksperimen Result of experiment Analisis dan mentafsir data Analyse and interpret data Kesimpulan Conclusion Langkah berjaga-jaga Precaution Contoh Laporan Murid Inferens : Pecutan bergantung pada jisim Inference : Acceleration is depend on mass Hipotesis : Apabila jisim bertambah , pecutan berkurang. Hypothesis : When the mass increased, the acceleration will be decreased. Tujuan : Untuk menyiasat hubungan di antara jisim dengan pecutan . Aim : To investigate the relationship between the acceleration and the mass Pemboleh ubah : Variables : i. Pemboleh ubah dimanipulasi : jisim Manipulated variable : masss ii. Pemboleh ubah bergerak balas : pecutan Responding variable : acceleration iii. Pemboleh ubah dimalarkan : Daya Constant variable : Force applied Senarai radas dan bahan : Lima troli, jangkamasa detik,pita detik , gelang getah , landasan condong terpampas geseran , bekalan kuasa . List of apparatus and material : 5 Trolleys, ticker timer, ticker tape, a rubber band, friction compensated inclined plane , runway, 12 V a.c power supply. Susunan radas dan bahan : Arrangement of apparatus and material : Trolley rubber band Ticker Timer Ticker tape Friction compensated runway Power supply Prosedur : Procedure : 1. Pita detik dilekatkan pada troli dan pita itu dilalukan melalui jangkamasa detik. The ticker tape is attached to a trolley and the tape is passed through the ticker-timer. 2. Troli itu ditarik ke belakang, menentang tali kenyal supaya tali kenyal diregangkan sehingga satu pemanjangan yang tetap. The trolley is pulled backwards against the elastic cord so that the elastic cord is stretched with a fixed extension. 3. Troli dilepaskan supaya trole menggelongsor menurun landasan. The trolley is released so that the trolley slides down the runway. 4. Pita detik dipotong kepada keratan-keratan dengan 5 detik dan satu carta pita dibinakan. The ticker tape is cut into 5 ticks strips and a tape chart is made. 5. Pecutan troli dihitungkan dengan menggunakan formula 𝑎 = v−u The acceleration of trolley is calculated by using formulae 𝑎 = t v−u t 6. Prosedur 2 hingga prosedur 5 diulangi dengan menggunakan 2,3,4 dan 5 troli. Procedure 2 to Procedure 5 are repeated by using 2, 3, 4 and 5 trolleys. Keputusan eksperimen : Result of experiment : Mass / num. of trolley 1 2 3 4 5 1 m (kg-1) 1.00 0.50 0.33 0.25 0.20 acceleration / cm s-2 110.0 55.0 36.0 28.0 22.0 Analisis dan mentafsir data: Analyse and interpret data: Kesimpulan : a berkadar langsung dengan . 1 m Conclusion : a is directly proportional to 1 m Langkah berjaga-jaga : Kedudukan mata hendaklah berserenjang dengan skala pembaris untuk mengelakkan ralat paralaks. Precaution : The position of eye must be perpendicular to the scale of meter rule to avoid pallarax error. KPS – 17 KM – 2 NM - 2 JUM - 20