Pulley Belts

• What is the purpose of a follower with a rolling motion?

  It reduces wear.
• When are flat followers typically used?

  Where space is limited.
• What is the function of V-belt pulley systems?

  • Transmit rotary motion
  • Transmit torque
• What happens when a larger pulley drives a smaller pulley?

  It results in increased speed but decreased torque.
• What occurs when a smaller pulley drives a larger pulley?

  It achieves decreased speed but increased torque.
• How is the speed of a pulley measured?

  In revolutions per minute (rpm).
• What is a pulley and belt system?

  • A system that uses pulley wheels
  • A belt to transmit rotary motion and torque
• What is a common mistake when calculating velocity ratios in pulley systems?

  Mixing up the driven pulley and the driver pulley.
• What is the formula for the velocity ratio (VR) of a pulley system?

  VR = Diameter of the driven pulley / Diameter of the driver pulley
• How is the speed of the driven pulley related to the rpm of the driver pulley?

  Speed of the driven pulley (rpm) = rpm of the driver pulley × Velocity ratio
• What do crank and slider mechanisms do?

  • Convert rotary motion to reciprocating motion
  • Convert reciprocating motion to rotary motion
• How does a crank and slider mechanism create reciprocating motion?

  The crank rotates and the connecting rod pushes the slider backwards and forwards.
• What is an example of a crank and slider mechanism in use?

  Piston engines in cars.
• What is the definition of a crank and slider mechanism?

  • A mechanism that converts rotary motion to reciprocating motion
  • Converts reciprocating motion to rotary motion