Question detail
Forces and motion scenario: air resistance changes until terminal velocity is reached. Which answer best addresses Distance, displacement, speed and velocity and the objective to calculate time from distance and 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 parachutist scenario, apply distance to calculate time from distance and speed while keeping distance versus displacement separate.
- B. In the parachutist scenario, mix up distance versus displacement and ignore distance.
- 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 calculate time from distance and speed.
Answer
The correct answer is: In the parachutist scenario, apply distance to calculate time from distance and speed while keeping distance versus displacement separate.
Explanation
The correct option is In the parachutist scenario, apply distance to calculate time from distance and speed while keeping distance versus displacement separate.. It is correct because the scenario says air resistance changes until terminal velocity is reached, which must be interpreted through Distance, displacement, speed and velocity. This directly supports the learning objective to calculate time from distance and speed. Use values 7, 6, and 17 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 distance versus displacement.
Common mistake
Common Mistake in Time Calculation
Students often confuse the formula for calculating time, using distance divided by speed instead of speed divided by distance.
Remind students that the correct formula is time = distance / speed. Encourage them to practice rearranging the formula and using it correctly in different contexts.
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