LEVER SYSTEM

Question 1

LEVER SYSTEM HELPS THE BODY TO (…)

Answer 1

MOVE

Question 2

WHAT IS A LEVER

Answer 2

A SOLID BAR THAT MOVES ABOUT A FIXED POINT WHEN FORCE IS APPLIED TO IT (WHEN A MUSCLE PULLS ON A BONE TO MOVE A BODY PART ABOUT A JOINT, IT USES THE PART AS A LEVER

Question 3

WHAT ARE THE FOUR DIFFERENT COMPONENTS OF THE LEVER SYSTEM

Answer 3

1) THE LEVER ARM
2) THE EFFORT
3) THE FULCRUM
4) THE LOAD

Question 4

WHAT IS THE LEVER ARM

Answer 4

THE BONE OR BODY PART BEING MOVED ABOUT A POINT ON A DIAGRAM OF A LEVER SYSTEM (SHOWN AS A STRAIGHT LINE)

Question 5

WHAT IS THE EFFORT

Answer 5

THE FORCE APPLIED BY THE MUSCLES TO THE LEVER ARM (SHOWN BY AN ARROW POINTING THE DIRECTION OF THE FORCE)

Question 6

WHAT IS THE FULCRUM

Answer 6

THE JOINT WHERE. THE LEVER ARM PIVOTS (SHOWN AS A TRIAGNLE)

Question 7

WHAT IS THE LOAD

Answer 7

THE RESISTANCE AGAINST THE PULL OF THE MUSCLES ON THE LEVER ARM (SHOWN AS A SQUARE)

Question 8

WHAT ARE THE THREE TYPES OF LEVER SYSTELM

Answer 8

FIRST CLASS
SECOND CLASS
THIRD CLASS

Question 9

HOW IS THE FIRSYT CLASS LEVER SYSTEM

Answer 9

THE LOAD AND EFFORT ARE AT OPPOSITE ENDS OF THE LEVER AND THE FULCRUM IS IN THE MIDDLE

EG: TILTING YOUR HEAD BACK USES A FIRST CLASS LEVER

Question 10

HOW IS THE SECOND CLASS

Answer 10

THE FULCRUM AND EFFORT ARE AT OPPOSITE ENDS OF THE LEVER AND THE LOAD IS IN THE MODDLE

EG: STANDING ON YOUR TOES USES A SECOND CLASS LEVER

Question 11

HOW IS THE THIRD CLASS

Answer 11

THE FULCRUM AND LOAD ARE AT OPPOSITE ENDS OF THE LEVER AND THE EFFORT IS IN THE MIDDLE

EG: FLEXION AT THE ELBOW

Question 12

LEVERS HAVE MECHANICAL (…) AND (…)

Answer 12

ADVANTAGE AND DISADVANTAGE

Question 13

WHAT IS A LEVER WITH A MECHANICAL ADVANTAGE

Answer 13

A LEVER IN THE BODY WITH A MECHANICAL ADVANTAGE CAN; MOVE A LARGE LOAD WITH A SMALL EFFORT HOWEVER IT CAN ONLY MOVE THE LOAD SHORT DISTANCES AT LOW SPEEDS

Question 14

WHAT IS A MECHANICAL DISADVANTAGE

Answer 14

A LEVER IN THE BODY WITH A MECHANICAL DISADVANTAGE REQUIRES; A LARGE EFFORT FROM THE MUSCLEES TO MOVE A SMALL LOAD HOWEVER IT CAN MOVE THE LOAD QUICKLY THROUGH A LARGE RANGE OF MOVEMENT

Question 15

SECOND CLASS LEVERS ALWAYS HAVE (…)

Answer 15

MECHANICAL DISADVANTAGE (THE EFFORT IS ALWAYS FURTHER FROM THE FULCRUM THAN THE LOAD IS)

Question 16

FIRST CLASS LEVER HAVE MECHANICAL ADVANTAGE

Answer 16

IF THE FULCRUM IS CLOSER TO THE LOAD THAN IT IS TO THE EFFORT

Question 17

FIRST CLASS HAS MECHANICAL DISADVANTAGE IF…

Answer 17

THE FULCRUM IS CLOSER TO THE EFFORT THAN IT IS TO THE LOAD

Question 18

THIRD CLASS LEVERS ALWAYS HAVE (…)

Answer 18

MECHANICAL DISADVANTAGE BECAUSE THE DISTANCE FROM THE FULCRUM TO THE EFFORT IS ALWAYS LESS THAN THE DISTANCE FROM THE FULCRUM TO THE LOAD