Page 67 - Hybrid PBD KSSM 2021 Tg 4 - Fizik

Fizik Tingkatan 4 Bab 2
8. Hitung pecutan objek bagi setiap situasi berikut. SP 2.1.2 TP3 KBAT Mengaplikasi
Calculate the acceleration of the object for each of the following situation.
(a) arah gerakan (b) arah gerakan
direction of motion direction of motion

2.5 cm 6.2 cm 7.8 7.8 cm 23.0 cm
23
u = 6.2 = 310 cm s –1 v = 2.5 = 125 cm s – 1 u = 5 × 0.02 = 78 cm s –1 v = 5 × 0.02 = 230 cm s –1
0.02 0.02 230 – 78
a = 125 – 310 = –2312.5 cm s –2 a = (4 – 1) × 5 × 0.02 = –506.6 cm s –2
(5 – 1) × 0.02

Sesaran / cm (c) Rajah di sebelah menunjukkan carta pita detik bagi sebuah troli
Displacement / cm yang bergerak. Setiap jalur pita detik itu mengandungi 10 detik.
Frekuensi bagi jangka masa detik ialah 50 Hz.
20.0 The diagram on the left shows a ticker tape chart for a moving trolley. Each strip of
the tape has 10 ticks. The frequency of the ticker-time is 50 Hz.
10.0 2.0
u = = 10 cm s –1
8.0 10 × 0.02
v = 12 = 60 cm s –1
6.0 10 × 0.02
60 – 10
4.0 Penerbitan Pelangi Sdn Bhd. All Rights Reserved.
= 50 cm s
a =
–2
(6 – 1) × 10 × 0.02
2.0
Masa
Time
9. Dengan menggunakan persamaan gerakan linear yang sesuai, selesaikan setiap soalan yang berikut.
By using the suitable linear motion equations, solve each of the following questions. SP 2.1.3 TP3 KBAT Mengaplikasi

(a) Sebuah kereta menekan brek dari halaju (b) Setelah sebuah kereta mengalami pecutan
25 m s dan berhenti setelah 4 saat. Hitung 4.5 m s sejauh 10 m, halaju kereta tersebut
–2
–1
–1
jarak yang diperlukan untuk kereta tersebut mencapai 10 m s . Hitung halaju kereta tersebut
berhenti. sebelum mula memecut.
–2
A car hit the break from 25 m s and stop after 4 seconds. After a car experienced an acceleration of 4. 5 m s for 10 m,
–1
Calculate the distance needed for the car to stop. the velocity of the car reached 10 m s . Calculate the velocity
–1
s =  u – v  t of the car before it starts to accelerate.
2 v = u +2as
2
2
=  25 + 0  4 10 = u + 2(4.5)(10)
2
2
2 u = 100 – 90
2

= 50 m u = 10
= 3.16 m s –1
Konsep Visual
Persamaan kinematik
Kinematic equation

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02 HYBRID PBD FIZIK F4.indd 26 05/11/2021 8:20 AM