Biomechanic

Syuk Bond
Syuk BondIndustrial Design Student à 7-Eleven
IDT 205
BIOMECHANIC
THE LEVER
A lever is one of the simplest mechanical devices. A
lever consists of a beam or stick or rod. It must have
something on which to pivot. This pivot is called a
fulcrum. A lever helps to lift weights with less
effort.
The Lever
First-class levers
Second-class levers
Third-class levers
Classes of Levers
First-class levers
First-class levers have the fulcrum placed
between the load and the effort, as in the
seesaw, crowbar, and balance scale. If the
two arms of the lever are of equal length, as
with the balance scale, the effort must be
equal to the load. If the effort arm is longer
than the load arm, as in the crowbar, the
effort travels farther than the load and is
less than the load.
See saw
Second-class levers
Second-class levers have the load between
the effort and the fulcrum. A wheelbarrow is
a second-class lever. The wheel’s axle is the
fulcrum, the handles take the effort, and the
load is placed between them. The effort
always travels a greater distance and is less
than the load.
Wheelbarrow
Third-class levers
Third-class levers have the effort placed
between the load and the fulcrum. The
effort always travels a shorter distance and
must be greater than the load. A hammer
acts as a third-class lever when it is used to
drive in a nail: the fulcrum is the wrist, the
effort is applied through the hand, and the
load is the resistance of the wood. Another
example of a third-class lever is the human
forearm: the fulcrum is the elbow, the effort
is applied by the biceps muscle, and the load
is in the hand.
Food chopstick
Study of Product
Stapler
Normal Stapler
Force
Fulcrum
Load
Third Class lever
Gun Stapler 1
Force
Fulcrum
Load
First Class lever
Gun Stapler 2
Force
Fulcrum
Load
Second Class Lever
Musculoskeletal injury refers to damage of muscular
or skeletal systems.
Usually due to a strenuous activity.
MUSCULOSKELATAL INJURY
Biomechanic
Biomechanic
A lever is one of the simplest mechanical devices.As
the conclusion,lever is important in our daily life.
Lever can make our life become easier. Lever can
increse the performance of people.
CONCLUSION
1 sur 14

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Biomechanic

  • 2. A lever is one of the simplest mechanical devices. A lever consists of a beam or stick or rod. It must have something on which to pivot. This pivot is called a fulcrum. A lever helps to lift weights with less effort. The Lever
  • 4. First-class levers First-class levers have the fulcrum placed between the load and the effort, as in the seesaw, crowbar, and balance scale. If the two arms of the lever are of equal length, as with the balance scale, the effort must be equal to the load. If the effort arm is longer than the load arm, as in the crowbar, the effort travels farther than the load and is less than the load. See saw
  • 5. Second-class levers Second-class levers have the load between the effort and the fulcrum. A wheelbarrow is a second-class lever. The wheel’s axle is the fulcrum, the handles take the effort, and the load is placed between them. The effort always travels a greater distance and is less than the load. Wheelbarrow
  • 6. Third-class levers Third-class levers have the effort placed between the load and the fulcrum. The effort always travels a shorter distance and must be greater than the load. A hammer acts as a third-class lever when it is used to drive in a nail: the fulcrum is the wrist, the effort is applied through the hand, and the load is the resistance of the wood. Another example of a third-class lever is the human forearm: the fulcrum is the elbow, the effort is applied by the biceps muscle, and the load is in the hand. Food chopstick
  • 11. Musculoskeletal injury refers to damage of muscular or skeletal systems. Usually due to a strenuous activity. MUSCULOSKELATAL INJURY
  • 14. A lever is one of the simplest mechanical devices.As the conclusion,lever is important in our daily life. Lever can make our life become easier. Lever can increse the performance of people. CONCLUSION