SIMPLE MACHINES

  • allows work to be performed

  • few or no moving parts

  • makes work easier

  • changing force, distance, and direction

Compound Machine - two or more machine that works together

  1. Lever - rigid bar used to exert pressure to lift objects

    1. Lift - nagaadjust

    2. Lever - Fulcrum

    3. Effort - Fulcrum

      Ex. seesaw, scissors, light switch


      Types of Lever - Class 5 - CBSE Class Notes Online - Classnotes123

  2. Wheel and Axle - lever arm, fixed to shaft called axle

    • travels in a straight line

      Ex. Doorknob, bicycle wheels, rolling office chair

  3. Pulleys - effort of pulling with rope, belt or chain

    • change in direction

      Ex. flagpole, well and bucket, window blinds