Moments Quiz
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5 questions, one answer each
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1. What is the equation for a moment?
- A. moment = force ÷ distance
- B. moment = force × distance normal to the force
- C. moment = force + distance
- D. moment = distance ÷ force
2. A force of 30 N is applied 0.2 m from a pivot, perpendicular to the pivot arm. What is the moment?
- A. 6 N m
- B. 150 N m
- C. 0.15 N m
- D. 32 N m
3. What does the principle of moments state for an object in equilibrium?
- A. All forces are equal
- B. Sum of clockwise moments = sum of anticlockwise moments
- C. The pivot must be in the centre
- D. Moments only occur with two forces
4. Why must the distance in a moment calculation be measured perpendicular to the force?
- A. Because moments are only defined for right angles
- B. Because only the perpendicular distance produces a turning effect
- C. Because perpendicular distances are easier to measure
- D. It doesn't need to be perpendicular
5. A see-saw is balanced with a 400 N child 1.5 m from the pivot. A second child sits 2 m from the pivot on the other side. What weight must they be for balance?
- A. 200 N
- B. 300 N
- C. 400 N
- D. 600 N