Acceleration & Speed-time Graph
Video 5.1: Acceleration
Video 5.2: Demo
Video 5.3: Demo
Video 5.4: Demo
Quiz 5
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Question 1 of 8
1. Question
A particle travelling at 7 m/s accelerates and reach 15 m/s after 4 seconds. Calculate the acceleration in m/s².
Satu jasad bergerak pada 7 m/s memecut dan mencapai 15 m/s selepas 4 saat. Hitung pecutan jasad itu dalam m/s².-
m/s²
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Question 2 of 8
2. Question
A ship sets off from a harbour and reaches a speed of 60 km/h after half an hour. Compute the acceleration of the ship in km/h².
Sebuah kapal bertolak dari pelabuhan dan mencapai kelajuan 60 km/j selepas setengah jam. Hitung pecutan kapal itu dalam km/j².-
km/h²
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Question 3 of 8
3. Question
A motorbike travelling at 4 m/s accelerates at 0.5 m/s2 . What is the speed of the motorbike after 6 seconds?
Sebuah motosikal bergerak dengan 4 m/s memecut dengan 0.5 m/s2 . Apakah laju motosikal itu selepas 6 saat?-
m/s
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Question 4 of 8
4. Question
A lorry travelling at 6 m/s applies break and decelerates at -0.8 m/s2 .
(a) What is the speed of the lorry after 5 seconds.
(b) How long does it take for the lorry to come to a complete stop?Sebuah lori bergerak dengan 6 m/s menekan brek dan mengalami nyahpecutan -0.8 m/s2 .
(a) Apakah laju lori itu selepas 5 saat?
(b) Berapa panjang masanya diambil oleh lori itu supaya berhenti.-
(a) m/s
(b) s
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Question 5 of 8
5. Question
A van travelling at 7.5 m/s starts to accelerate at 0.4 m/s2 .
(a) What is the speed of the van after 6 seconds?
(b) How long does it take for the van to reach 11.5 m/s?Sebuah van bergerak dengan 7.5 m/s mula memecut pada 0.4 m/s2 .
(a) Apakah laju van itu selepas 6 saat?
(b) Berapa lama diambil untuk van itu mencapai 11.5 m/s?-
(a) m/s
(b) s
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Question 6 of 8
6. Question
A bus reaches 12 m/s after accelerating at 1.2 m/s2 for 6 seconds. What is the speed of the bus before it starts to accelerate?
Sebuah bas mencapai 12 m/s selepas memecut pada 1.2 m/s2 untuk 6 saat. Apakah laju bas itu sebelum ia mula memecut?-
m/s
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Question 7 of 8
7. Question
A car accelerates and reaches a speed of 12 m/s. Then the driver sees a child in the middle of the road. He brings his car to a stop in 2 seconds just in time. What is his acceleration?
Sebuah kereta memecut dan mencapai laju 12 m/s. Selepas itu pemandu kereta itu melihat seorang budak di tengah jalan raya. Dia mempunyai 2 saat untuk hentikan keretanya. Apakah pecutannya jikalau dia berhenti tepat sebelum melanggar budak itu?
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m/s²
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Question 8 of 8
8. Question
A motorbike brought itself to a complete stop in 1.5 seconds and the deceleration was -5 m/s2. What speed was he travelling at before applying the break?
Sebuah motosikal berhenti dalam 1.5 saat dan nyahpecutannya ialah -5 m/s2. Apakah laju yang motosikal itu bergerak sebelum ia menekan brek?-
m/s
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Video 6.1: Unit of acceleration.
Video 6.2: Demo
Video 6.3: Demo
Video 6.4: Demo
Quiz 6
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Question 1 of 4
1. Question
A slow cargo train travelling at 45 km/h accelerates and reaches a speed of 65 km/h in 5 minutes. Find the acceleration in km/h per minute .
Sebuah keretapi kargo bergerak dengan 45 km/j dan mencapai laju 65 km/j dalam 5 minit. Cari pecutannya dalam km/j per minit..-
km/h per minute
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Question 2 of 4
2. Question
A lorry travelling at 60 km/h applies break and comes to a halt after 4 seconds. Find the deceleration in km/h per second.
Sebuah lori yang bergerak pada 60 km/j menekan brek dan berhenti selepas 4 saat. Cari nyah pecutan dalam km/j per saat.-
km/h per second
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Question 3 of 4
3. Question
An aeroplane travelling at 500 km/h accelerates at 80 km/h per minute. What is the speed of the aeroplane after 7 minutes?
Sebuah kapal terbang bergerak dengan 500 km/j memecut pada 80 km/j per minit. Apakah laju kapal terbang itu selepas 7 minit?-
km/h
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Question 4 of 4
4. Question
An aeroplane travelling at 500 km/h accelerates at 80 km/h per minute.How long does it take, in minutes, to reach a speed of 940 km/h?
Sebuah kapal terbang bergerak dengan 500 km/j memecut pada 80 km/j per minit. Berapakah minit yang akan diambil untuk ia mencapai laju 940 km/j.-
minutes
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Video 7: Speed-time graph.
Quiz 7
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Question 1 of 4
1. Question
Describe the speed of the following graph.
Huraikan laju dari graf berikut.(a)
(b)
(c)
Finished? (click yes when finished to check the answer)
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Question 2 of 4
2. Question
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Question 3 of 4
3. Question
How long does it take for the vehicle to accelerate from 20 km/h to 35 km/h?
Berapakah masa yang diambil untuk kenderaan ini memecut dari 20 km/j ke 35 km/j?-
s
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Question 4 of 4
4. Question
Compare the movement of object A and object B.
Bandingkan pergerakkan objek A dan objek B.Finished? (click yes when finished to check the answer)
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Video 8: Summary
Practice 2
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Question 1 of 11
1. Question
Yusof sets off at 10.30 in the morning and reaches his destination at 11.45 am. He has been travelling at an average speed of 90 km/h. How far has he travelled?
Yusof bertolak pada 10.30 pagi dan tiba destinasinya pada 11.45. Yusof bergerak dengan laju purata 90 km/j. Berapa juahkah yang dia sudah bergerak?-
km
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Question 2 of 11
2. Question
The ETS train of Keretapi Tanah Melayu can travel as fast as 140 km/h. If the ETS train travels at a uniform speed of 140 km/h, how long does it take to cover 532 km?
Keretapi ETS dari Keretapi Tanah Melayu boleh mencapai laju 140 km/j. Jikalau keretapi ETS bergerak dengan laju seragam 140 km/j, berapa lamakah masa yang diambil dalam jam untuk meliputi 532 km?
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hours
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Question 3 of 11
3. Question
The distance from Kuching to Sibu is 412.5 km. Ravi drives for 4 and a half hours to reach Sarikei. He took a rest at Sarikei for 20 minutes before finishing his journey to Sibu in another 40 minutes. What is the average speed for the whole journey?
Jarak antara Kuching dan Sibu ialah 412.5 km. Ravi memandu 4 dan setengah jam untuk sampai ke Sarikei. Dia berehat di Sarikei untuk 20 minit sebelum melanjutkan perjalanannya ke Sibu dalam 40 minit. Apakah laju puratanya untuk seluruh perjalanan itu?
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km/h
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Question 4 of 11
4. Question
A bus was travelling at 60 km/h from town A to town B. The distance between town A to town B is 40 km. From town B to town C there was a highway and it was travelling at 90 km/h for 20 minutes to reach town C. What is the average speed for the whole journey?
Sebuah bas bergerak dengan 60 km/j dari bandar A ke bandar B. Jarak antara bandar A dan B ialah 40 km. Dari bandar B ke bandar C, bas itu bergerak pada 90 km/j di lebuhraya untuk 20 minit. Apakah laju purata untuk seluruh perjalanan?
-
km/h
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Question 5 of 11
5. Question
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Question 6 of 11
6. Question
What is the acceleration in m/s2 of an object with the following speed?
Apakah pecutan dalam m/s2 untuk objek yang bergerak dengan laju berikut?-
m/s²
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Question 7 of 11
7. Question
A car is travelling at 100 km/h on highway. To overtake the truck ahead, the driver accelerates the car at 8 km/h per second. What is the speed of the car after 3 seconds?
Sebuah kereta bergerak pada 100 km/j di lebuh raya. Untuk memintas sebuah trak di hadapan, kereta itu memecut pada 8 km/j per saat. Apakah laju kereta itu selepas 3 saat?
-
km/h
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Question 8 of 11
8. Question
James is cycling at a speed of 10 m/s. If he increases his speed to 14 m/s in 5 seconds, calculate the acceleration in m/s².
James sedang mengayuh basikal dengan laju 10 m/s. Jikalau dia meningkatkan lajunya ke 14 m/s dalam 5 saat, hitung pecutannya dalam m/s².
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m/s²
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Question 9 of 11
9. Question
A large cargo ship starts to slow down 20 km before the port. If it take the boat 20 minutes to slow down from 80 km/h to 20 km/h. What is the deceleration of the boat in km/h²?
Sebuah kapal kargo mula memperlahankan lajunya 20 km sebelum pelabuhan. Jikalau kapal itu mengambil masa 20 minit untuk memperlahankan lajunya dari 80 km/j ke 20 km/j Apakah nyah pecutan kapal itu dalam km/j²?
-
km/h²
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Question 10 of 11
10. Question
A truck decelerates at 15 km/h per second and comes to a complete stop after 4.5 seconds. What speed was it travelling at?
Sebuah lori mengalami nyahpecutan pada 15 km/j per saat dan berhenti selepas 4.5 saat. Apakah laju yang ia bergerak pada mulanya.
-
km/h
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Question 11 of 11
11. Question
A car travelling at 50 km/h accelerates at 6 km/h per second. How long does it take for the car to reach 110 km/h?
Sebuah kereta bergerak dengan 50 km/j memecut dengan 6 km/j per saat. Berapa masa yang diambil oleh kereta itu untuk mencapai 110 km/j?
-
s
CorrectIncorrect -
SPEED and ACCELERATION
Video 5.1
Acceleration
Pecutan
Video 5.2
Demo.
Video 5.3
Demo.
Video 5.4
Demo.
Video 6.1
Unit of acceleration.
Unit pecutan
Video 6.2
Demo.
Video 6.3
Demo.
Video 6.4
Demo.
Video 7
Speed-time graph.
Graf laju-masa.
Video 8
Summary.