Podcast
Questions and Answers
What is the standard unit of speed used by scientists?
What is the standard unit of speed used by scientists?
- Metres per second (correct)
- Miles per hour
- Knots
- Kilometers per hour
How can you find the speed if you know the distance and the time?
How can you find the speed if you know the distance and the time?
- Divide total distance by total time (correct)
- Add distance to time
- Divide total time by distance
- Multiply distance by time
Using the formula triangle, which operation would you perform to find distance?
Using the formula triangle, which operation would you perform to find distance?
- Add speed and time
- Subtract time from speed
- Multiply speed by time (correct)
- Divide distance by time
If a vehicle travels at a speed of 20 m/s for 120 seconds, what distance does it cover?
If a vehicle travels at a speed of 20 m/s for 120 seconds, what distance does it cover?
Which of the following correctly represents calculating time based on speed and distance?
Which of the following correctly represents calculating time based on speed and distance?
If a cyclist travels at a speed of 15 m/s for 90 seconds, what distance will they cover?
If a cyclist travels at a speed of 15 m/s for 90 seconds, what distance will they cover?
What is the time taken to travel a distance of 500 m at a constant speed of 25 m/s?
What is the time taken to travel a distance of 500 m at a constant speed of 25 m/s?
A plane flies at a speed of Mach 1 for 300 seconds. If Mach 1 is approximately 343 m/s, what is the distance covered?
A plane flies at a speed of Mach 1 for 300 seconds. If Mach 1 is approximately 343 m/s, what is the distance covered?
If a ship travels at a speed of 12 knots for 2 hours, how far does it go? (1 knot = 1.852 km)
If a ship travels at a speed of 12 knots for 2 hours, how far does it go? (1 knot = 1.852 km)
How long will it take to cover a distance of 750 m at a speed of 30 m/s?
How long will it take to cover a distance of 750 m at a speed of 30 m/s?
Flashcards
Speed formula
Speed formula
Speed is calculated by dividing the total distance traveled by the total time.
Speed units
Speed units
Different units of speed exist for different applications, including metres per second (m/s), miles per hour, and knots.
Formula Triangle
Formula Triangle
A visual tool to calculate distance, speed, or time.
Calculate distance
Calculate distance
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Calculate time
Calculate time
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What does 'per' mean in speed units?
What does 'per' mean in speed units?
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What is the standard scientific unit for speed?
What is the standard scientific unit for speed?
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Study Notes
Units of Speed
- Different countries use different units for speed
- Scientists use metres per second (m/s)
- "Per" means "in each"
- Examples of units: knots, Mach, km/h, miles per hour
Calculating Speed
- Speed is the distance an object travels in a specific time period
- Formula: Speed = Distance / Time
- For example: If a bus travels 100m in 20 seconds, the speed is 5 m/s
Formula Triangle
- A formula triangle can help determine the unknown value in the equation if two other values are known:
- Distance= speed * time
- Speed = distance / time
- Time = distance / speed
Worked Example
- Marcus rides a bicycle at 4m/s for 60s
- Distance travelled = 240m
Questions and Answers
- Example question: Sofia is in a car travelling at a speed of 35 m/s. How long will the car take to travel 2100m?
- Answer: 60 seconds
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