Question detail
Forces and motion scenario: speed changes over a measured time interval. Which answer best addresses Distance, displacement, speed and velocity and the objective to distinguish average speed from instantaneous speed?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Forces and motion
Question
- A. In the athlete sprint scenario, apply speed to distinguish average speed from instantaneous speed while keeping speed versus velocity separate.
- B. In the athlete sprint scenario, mix up speed versus velocity and ignore speed.
- C. Use a general revision statement without applying Distance, displacement, speed and velocity to the situation.
- D. Choose a different forces topic instead of explaining distinguish average speed from instantaneous speed.
Answer
The correct answer is: In the athlete sprint scenario, apply speed to distinguish average speed from instantaneous speed while keeping speed versus velocity separate.
Explanation
The correct option is In the athlete sprint scenario, apply speed to distinguish average speed from instantaneous speed while keeping speed versus velocity separate.. It is correct because the scenario says speed changes over a measured time interval, which must be interpreted through Distance, displacement, speed and velocity. This directly supports the learning objective to distinguish average speed from instantaneous speed. Use values 3, 9, and 20 only if the question asks for a calculation. The answer earns credit by naming the relevant force or motion quantity, using units when needed, and avoiding the boundary error speed versus velocity.
Common mistake
Average vs Instantaneous Speed Confusion
Students often confuse average speed with instantaneous speed, thinking they are the same concept.
To fix this, remember that average speed is calculated over a total distance and time, while instantaneous speed is the speed at a specific moment. Practice identifying examples of each in different scenarios.
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