Question detail
Forces and motion scenario: two trolleys collide and momentum is compared before and after. Which answer best addresses Stopping distances and safety and the objective to explain how poor tyre or brake condition can increase braking distance?
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 collision scenario, apply braking distance to explain how poor tyre or brake condition can increase braking distance while keeping distance versus displacement separate.
- B. In the collision scenario, mix up distance versus displacement and ignore braking distance.
- C. Use a general revision statement without applying Stopping distances and safety to the situation.
- D. Choose a different forces topic instead of explaining explain how poor tyre or brake condition can increase braking distance.
Answer
The correct answer is: In the collision scenario, apply braking distance to explain how poor tyre or brake condition can increase braking distance while keeping distance versus displacement separate.
Explanation
The correct option is In the collision scenario, apply braking distance to explain how poor tyre or brake condition can increase braking distance while keeping distance versus displacement separate.. It is correct because the scenario says two trolleys collide and momentum is compared before and after, which must be interpreted through Stopping distances and safety. This directly supports the learning objective to explain how poor tyre or brake condition can increase braking distance. Use values 5, 7, and 14 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
Misunderstanding Braking Distance
Students often confuse braking distance with stopping distance, thinking they are the same.
Remember that braking distance is only the distance travelled while the brakes are applied, while stopping distance includes both thinking distance and braking distance.
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