Page 8 - Modul A+1 Fizik Tingkatan 5

2. Berdasarkan rajah di bawah, tentukan daya paduan, F dan arahnya dengan menggunakan kaedah segi tiga dan kaedah
segi empat selari. Anda boleh gunakan skala 1 cm : 50 N TP 4
Based on the diagram below, determine the resultant force, F and its direction by using triangle method and parallelogram
method. You may use scale 1 cm : 50 N

F = 100 N
1
60° BAB 1

= 200 N
F 2

Penyelesaian/ Solution:
(a) Kaedah segi tiga/ Triangle method (b) Kaedah segi empat selari/ Parallelogram method

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4 cm
2 cm 30° 4 cm
F F F
1 2 2 cm 1
F r
60°
5.3 cm
2 cm
F
r
F
5.3 cm 4 cm 2
F = 5.3 cm × 50 = 265 N
Arah / Direction = 41° dari / from F 1 F = 5.3 cm × 50 = 265 N 1
Arah / Direction = 41° dari / from F

B Menyelesaikan masalah melibatkan daya paduan, jisim dan pecutan objek
Solving problem involve resultant force, mass and acceleration of object

1. Selesaikan masalah di bawah dengan: TP 3
Solve the problems below by:
(a) Menghitung pecutan
Calculating the acceleration
(b) Menyatakan arah gerakan yang terhasil
State the direction of motion produced
(i) Penyelesaian/ Solution:
(a) F = ma (b) Arah: Ke kanan
8 N
2 N m = 3 kg 8 + 4 – 2 = 3a Direction: To the right
4 N
a = 3.33 m s –2

(ii) Penyelesaian/ Solution:

(a) F = ma (b) Arah: Tidak bergerak
8 N m = 3 kg 8 N 8 – 8 = 3a Direction: Not moving
a = 0 m s –2

(iii) 8 N Penyelesaian/ Solution:
(a) F = ma
8 – 5 = 3a
m = 3 kg a = 1 m s –2
(b) Arah: Ke atas
Direction: Upward
5 N

5

01_Modul A+ Fizik Tg5.indd 5 28/10/2021 10:57 AM