Levers and Gears (T)

• What is the definition of a moment in physics?

  Moment is the turning effect of a force.
• How is the moment calculated?

  Moment = Force × Distance
• What is the requirement for the distance when calculating moment?

  The distance must be perpendicular to the line of action of the force.
• How do levers transmit the turning effects of forces?

  • Levers transmit the turning effect of the force from one side of the pivot to the other.
  • They act as force multipliers, allowing a small force to lift a heavy object.
• How does a lever allow lifting a heavy object with a smaller force?

  It multiplies the force by increasing the distance from the pivot.
• What is the relationship between the forces and distances on either side of a lever?

  The moments must be equal on both sides of the lever.
• What is the role of gears in transmitting force?

  • Gears transmit the turning effect of a force in machines.
  • They connect different components, such as an engine to wheels.
• How does the radius of gears affect the turning effect?

  A larger radius results in a larger turning effect.
• What happens to the turning effect when gear A turns and applies force to gear B?

  The turning effect of gear B is doubled compared to gear A.
• How do the rotations of gear A and gear B relate to each other?

  Gear A rotates twice for every rotation of gear B.
• What is the relationship between work done by gears A and B?

  • The work done by both gears is the same.
  • This is due to the conservation of energy in the gear system.