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Teknik Menjawab Kertas 3 Bahagian B

12 Markah

A student investigate how the extension of a spring changes with the load acting on a spring.

Diagram 1.1 and 1.2 show what happens when two different loads are hang on two identicalsprings.

Based on the information and the observation above:

Berdasarkan maklumat dan pemerhatian di atas:

a) State one suitable inference that can be made

Nyatakan satu inferens yang sesuai [1 mark]

* pesanan :

baca soalan dengan teliti dan carikan pembolehubah yang tersurat dalam maklumat yang

diberi.

Contohnya pemboleh ubah boleh laras ( manipulated variable ) ialah beban load // force //

mass) yang digunakan , dan pemboleh ubah bersandar ( responding variable) ialah

pemanjangan spring. ( extention of spring ).

Sambungkan pemboleh ubah yang dikesan dengan kata kunci seperti

http://1.bp.blogspot.com/_FAgA6-CHYr8/TMk_7XKkgsI/AAAAAAAAAm8/WkEpwHzb5-Y/s1600/spring.bmp

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Contoh:

Pembaris (Meter rule ) --> mengukur panjang spring.

(iv) The arrangement of the apparatus

Susunan radas

* pesanan :

Lukiskan dan labelkan susunan radas yang berfungsi.

(v) The procedure of the experiment which include the method of controlling the manipulated

variable and the method of measuring the responding variable.

Prosedur eksperimen termasuk kaedah mengawal pembolehubah dimanipulasi dan kaedah

mengukur pembolehubah bergerakbalas

* pesanan :

Senaraikan arahan menguju MV dan RV, dicadangkan arahan mengulangi ujikaji sebanyak 4

kali .

(vi) The way you would tabulate the data

Cara untuk menjadualkan data

* pesanan :

Lakarkan jadual berlabel dan tandakan unit kuantiti fizikal.

(vii) The way you would analyse the data

Cara untuk menganalisis data [10 marks]

*pesanan:

Lakarkan graf dengan tandakan MV (di paksi-x) dan RV (dipaksi-y) pastikan unit yang betul diberi.

Suggested answer:

a) Inference :

The pulling force influences the extension of the spring//

The length of spring is influenced by the pulling force//

Length of spring depends on the force acting on it.

b) Hypothesis:

The bigger the force , the longer the spring.//

When the force(mass) increases, the length of the spring increase

C)

i) Aim:To investigate the relationship between force //mass and the extension of the spring

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ii)

Manipulated variable : Force, F// mass

Responding variable: Extension of spring, x

Fixed variable: Diameter// stiffness of spring/ the initial length, lo/ spring constant of spring,k

iii) List of apparatus/ materials :

Spring, pin, slotted weight, retort stand with clamp, meter rule and plasticine.

iv) Arrangement of the apparatus( with labels )

v)

~ Method of controlling the manipulated variable :1. Determine the initial length, lo, without any slotted weight hung to the spring.

2. Hang a slotted weight of mass 50 g, (force/weight of 0.5 N) and measure the length of the

spring .

~Method of measuring the responding variable :3. Calculate the extension of the spring, x using the formula ( length l) (initial length, lo)

~Repeating :4. Repeat the experiment using mass of 100g, 150g, 200g and 250g (or force, F= 1.0 N, 1,5 N,

2.0 N and 2,5 N)

vi)

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Selamat Maju Jaya.