science 5

1. PARTS OF SIMPLE
MACHINE

2. LEVER
THE THREE PARTS OF A LEVER ARE
EFFORT, LOAD, AND FULCRUM.
EFFORT – THE FORCE APPLIED
LOAD – THE WEIGHT PLACED ON THE
OPPOSITE SIDE
FULCRUM – A FIXED POINT IN WHICH
A LEVER TURNS.


3. 3 BASIC TYPES OF LEVER
FIRST CLASS LEVER
THE FULCRUM IS BETWEEN THE
LOAD AND THE FORCE
EX. SCISSOR, SEESAW


4. SECOND CLASS LEVER
THE LOAD LIES BETWEEN THE
FULCRUM AND THE APPLIED FORCE
EX. CAN OPENER AND WHEEL
BORROW


5. THIRD CLASS LEVER

THE EFFORT APPLIED IS BETWEEN
THE LOAD AND THE FULCRUM
EX. TWEEZERS AND SPADES

6. INCLINED PLANE
AN INCLINED PLANE IS CONSIST OF
AN INCLINED TRACK OR RAMP.
 IT HAS A FLAT SURFACE WITH ONE
END HIGHER THAN THE OTHER.
 EX. STAIRCASE


7. PULLEY
A GROOVED WHEEL WITH A ROPE
RIDING IN THE GROOVE . IT TURNS
ON AN AXLE


8. 3 TYPES OF PULLEY
FIXED PULLEY – COMPOSED OF
GROOVED WHEEL ON A FIXED AXLE.
 MOVABLE PULLEY – THE LOAD IS
ATTACHED TO THE AXLE OF THIS
PULLEY.


9. 
BLOCK AND TACKLE – THE PULLEYS
ARE MOUNTED IN FRAMES CALLED
BLOCKS. EACH BLOCK HAS A HOOK
BY WHICH IT WAS FASTENED TO
SUPPORT OR TO THE LOAD.

10. WHEEL AND AXLE
CONSIST OF 2 CONCENTRIC
WHEELS OF DIFFERENT SIZE.
THE SMALLER WHEEL IS THE AXLE
EX. DOORKNOB



11. WEDGE
A WEDGE IS A DEVICE THAT HAS
TWO OR MORE SLOPING SURFACES
THAT TAPER EITHER TO A SHARP
EDGE OR TO A POINT.


12. SCREW
A SCREW HAS 2 MAIN PARTS
 THE BODY AND THE THREAD
 THE CENTER LINE OF THE BODY IS
CALLED THE AXIS
 THE DISTANCE BETWEEN TWO
ADJACENT CREST OF THE THREAD IS
KNOWN AS THE PITCH
