Question detail
A trolley of mass 2 kg accelerates at 3 m/s?. What resultant force acts?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Work done and energy transfer
Question
- A. The resultant force is 6 N using F = ma.
- B. The resultant force is 1.5 N by dividing mass by acceleration.
- C. The resultant force is 5 N by adding mass and acceleration.
- D. The resultant force is zero because the trolley is already moving.
Answer
The correct answer is: The resultant force is 6 N using F = ma.
Explanation
The correct option is The resultant force is 6 N using F = ma.. This fits Energy transfer and braking in Work done and energy transfer because it uses the named force or motion relationship in the situation, gives the correct unit or graph meaning where needed, and avoids the specific misconception in the distractors.
Common mistake
Misunderstanding Energy Dissipation
Students often think that increased speed only affects the distance required to stop, not the amount of energy that must be dissipated.
Emphasize that as speed increases, the kinetic energy of the vehicle increases, which means more energy must be dissipated by the brakes to bring the vehicle to a stop.
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