Question detail
In a lever system, what is the relationship between the length of the lever arm and the force required to achieve the same moment?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Moments, levers and gears (physics only)
Question
- A. A longer lever arm requires more force
- B. A longer lever arm requires less force
- C. The length of the lever arm has no effect on the force
- D. A shorter lever arm is always more efficient
Answer
A longer lever arm requires less force
Explanation
A longer lever arm allows the same moment to be achieved with a smaller force, demonstrating the mechanical advantage of levers.
Common mistake
Understanding Moment
Students often confuse the concept of moment with just the force applied, forgetting that moment also depends on the distance from the pivot.
To fix this, remember that moment is calculated as the product of force and the perpendicular distance from the pivot. Always consider both factors when discussing moments.
Related flashcards
Flashcard 1 of 5
Related practice questions
Question 1 of 5
Choose an answer, get feedback, then move sideways through the set.