Let's Lift an Elephant

• PULLEY:
  • • It consists of a circular disc made of metal or wood with a groove cut along its rim.
    • A rope passes around the groove; the groove prevents it from slipping off.
    • Pulley rotates about an axle fixed to a support called the block.
    • Load is attached to one end and the effort is applied to the other end.
    • Pulley allows us to apply force in a conveni…