10 questions · Form 2 Mathematics Bab 9: Speed and Acceleration
10 questions · plays in fullscreen
Prefer reading to quizzing? All 10 questions are listed below with the answer and explanation under each one.
1. Convert 15 m/s into km/h.
Answer: A
15 m/s = 15 * 36001000 = 54 km/h.
2. A cyclist moves at a constant speed of 8 m/s for 30 seconds. Calculate the total distance traveled.
Answer: A
Distance = Speed * Time = 8 m/s * 30 s = 240 m.
3. A bus travels 60 km in the first hour and 80 km in the next two hours. What is the average speed for the entire journey?
Answer: A
Total Distance = 60 + 80 = 140 km. Total Time = 1 + 2 = 3 hours. Average Speed = 1403 = 46.67 km/h.
4. An athlete accelerates from 2 m/s to 10 m/s in 4 seconds. Calculate the acceleration.
Answer: A
Acceleration = 10 - 24 = 84 = 2 m/s².
5. Convert 72 km/h into m/s.
Answer: A
72 km/h = 72 * 1000 m3600 s = 720003600 = 20 m/s.
6. How long does a train travelling at 100 km/h take to cover a distance of 250 km?
Answer: A
Time = Distance / Speed = 250100 = 2.5 hours.
7. Which SI unit is commonly used for acceleration?
Answer: A
The standard SI unit for acceleration is meters per second squared (m/s²).
8. A lorry decelerates at 2 m/s² from 20 m/s to 10 m/s. How long did this take?
Answer: A
t = v - ua = 10 - 20-2 = -10 / -2 = 5 seconds.
9. A runner completes a 400 m track in 50 seconds. Find the average speed of the runner.
Answer: A
Average Speed = 400 m50 s = 8 m/s.
10. A motorcycle accelerates at 3 m/s² from an initial speed of 10 m/s for 4 seconds. What is its final speed?
Answer: A
Final Speed v = u + at = 10 + (3 * 4) = 10 + 12 = 22 m/s.