Question detail
A parachutist reaches terminal velocity. Which force statement is correct?
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 elasticity
Question
- A. Weight and air resistance are balanced, so acceleration is zero.
- B. Weight disappears when terminal velocity is reached.
- C. Air resistance is zero because speed is constant.
- D. The resultant force is downward and increasing.
Answer
The correct answer is: Weight and air resistance are balanced, so acceleration is zero.
Explanation
The correct option is Weight and air resistance are balanced, so acceleration is zero.. This fits Required practical: force and extension in Forces and elasticity 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
Overloading Springs
Students often believe that springs can be overloaded without any consequences, thinking they will always return to their original shape.
Emphasize that exceeding the elastic limit of a spring can cause permanent deformation, and the spring may not return to its original length.
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