Podcast
Questions and Answers
What is the SI unit for length or distance?
What is the SI unit for length or distance?
What does a horizontal line on a distance-time graph indicate?
What does a horizontal line on a distance-time graph indicate?
What is the quantity that represents the rate of change in displacement with respect to time?
What is the quantity that represents the rate of change in displacement with respect to time?
If a lizard can run 8 m across the water in 4 seconds, how fast is he traveling?
If a lizard can run 8 m across the water in 4 seconds, how fast is he traveling?
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What is the rate at which velocity changes called?
What is the rate at which velocity changes called?
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How far did the tiger travel in 8 seconds?
How far did the tiger travel in 8 seconds?
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What is the formula to calculate speed?
What is the formula to calculate speed?
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A cheetah travels 75 m in 3 seconds. What is her velocity?
A cheetah travels 75 m in 3 seconds. What is her velocity?
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Study Notes
Speed and Distance
- The SI unit for length or distance is meter (m).
- Speed is the rate at which distance is covered.
Acceleration
- Acceleration is the rate at which velocity changes.
- To determine which car has the greatest acceleration, calculate the rate of change in velocity.
Velocity
- Velocity is the rate of change in displacement with respect to time.
- Formula to calculate speed: speed = distance / time.
- A tiger travels 96 m in 8s, so its velocity is 96 m / 8 s = 12 m/s.
- A cheetah travels 75 m in 3 s, so its velocity is 75 m / 3 s = 25 m/s.
Distance-Time Graphs
- A horizontal line on a distance-time graph indicates that the object is stationary.
- The distance-time graph shows the journey of a student who walks 2.0 km in 30 minutes, stops for 15 minutes, and then travels 1.0 km in 15 minutes.
Motion
- Velocity has both magnitude and direction.
- The rate at which velocity changes is called acceleration.
- An object moving at a constant speed away from the start and then stopping is represented by a horizontal line on a distance-time graph.
Examples
- Edward drove 80 miles from his home to London, stopping to visit his friend Nicola on the way. He was 40 miles from home when he visited Nicola.
- An object travels 400 m in 20 minutes, so its speed is 400 m / 20 min = 20 m/min.
- A lizard runs 8 m across the water in 4 seconds, so its speed is 8 m / 4 s = 2 m/s.
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Description
Test your understanding of motion, velocity, and acceleration with this quiz. Covers topics such as distance, speed, and acceleration calculations.
