Moments, Levers and Gears Quiz
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5 questions, one answer each
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1. What is the moment of a force?
- A. The turning effect of a force about a pivot
- B. The total force acting on an object
- C. The distance travelled by a force
- D. The time it takes for a force to act
2. Calculate the moment when a force of 50 N is applied at a perpendicular distance of 0.4 m from the pivot.
- A. 12.5 N m
- B. 20 N m
- C. 50 N m
- D. 200 N m
3. A balanced lever has a load of 600 N at 0.5 m from the pivot. The effort force is applied at 1.5 m from the pivot. What effort force is needed for the system to remain in equilibrium?
- A. 150 N
- B. 200 N
- C. 300 N
- D. 400 N
4. How does a lever act as a force multiplier?
- A. It increases the speed of movement
- B. It reduces the distance the effort moves compared to the load
- C. It increases the force applied by moving the effort further from the pivot than the load
- D. It changes the direction of all applied forces
5. Two interlocking gears have different numbers of teeth. Gear A (driving gear) has 20 teeth and rotates clockwise at 100 revolutions per minute. Gear B (driven gear) has 60 teeth. Which statement is correct?
- A. Gear B rotates clockwise at approximately 33 rpm and with increased rotational force
- B. Gear B rotates anticlockwise at approximately 33 rpm and with increased rotational force
- C. Gear B rotates clockwise at 100 rpm and with the same rotational force
- D. Gear B rotates anticlockwise at 300 rpm and with decreased rotational force