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REPORTER: Carmela Mendoza
Simple Machine
Throughout history, humans have developed a
number of devices to make work easier. The most
notable of these are known as the "six simple
machines": the wheel and axle, the lever, the
inclined plane, the pulley, the screw and the wedge
SIMPLE MACHINE
A simple machine is a mechanical device that changes
the direction or magnitude of a force
Types of Simple Machine
PulleyScrew
Inclined Plane
Wedge Lever Wheel and axle
Screw
 mechanism that converts rotational motion
to linear motion, and a torque (rotational force)
to a linear force
Pulley
 A pulley is a wheel on an axle or shaft that is
designed to support movement and change of
direction of a cable or belt along its
circumference.
Inclined Plane
 also known as a ramp, is a flat supporting
surface tilted at an angle, with one end higher
than the other, used as an aid for raising or
lowering a load
Wedge
 triangular shaped tool, and is a
portable inclined plane
 can be used to separate two objects or
portions of an object
Lever
 machine consisting of a beam or rigid rod
pivoted at a fixed hinge, or fulcrum
Class of Lever
Class 1:
 Fulcrum in the middle: the effort is applied on
one side of the fulcrum and the resistance on
the other side, for example, a seesaw,
a crowbar or a pair of scissors. Mechanical
advantage may be greater or less than 1.
Class 2:
 Resistance in the middle: the effort is applied
on one side of the resistance and the fulcrum
is located on the other side, for example,
a wheelbarrow, a nutcracker, a bottle
opener or the brake pedal of a car. Mechanical
advantage is always greater than 1.
Class 3:
 Effort in the middle: the resistance is on one
side of the effort and the fulcrum is located on
the other side, for example, a pair
of tweezers or the human mandible.
Mechanical advantage is always less than 1.
Wheel and Axle
 The wheel and axle is generally considered to
be a wheel attached to an axle so that these
two parts rotate together in which a force is
transferred from one to the other. In this
configuration a hinge, or bearing, supports the
rotation of the axle.
Importance of Simple Machine
 Screws - used to hold different parts of machines
together.
 Pulley - make it easier to pull a rope, to change the
direction of a force, or to get more mechanical
advantage and lift something heavier than you can lift
by yourself.
 Inclined plane - a load can be pulled up the plane by a
sideways input force and heavy objects may be lifted.
 Wedge - can take something apart that is really big
and it is easier to move
 Lever -helps you move something heavy, or make
something go fast.
 Wheel and Axle – used to lift weights.
General Importance of Simple
Machine
 transferring a force from one place to another,
 changing the direction of a force,
 increasing the magnitude of a force, or
 increasing the distance or speed of a force.
THANK YOU !

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Simple machine

  • 2. Throughout history, humans have developed a number of devices to make work easier. The most notable of these are known as the "six simple machines": the wheel and axle, the lever, the inclined plane, the pulley, the screw and the wedge
  • 3. SIMPLE MACHINE A simple machine is a mechanical device that changes the direction or magnitude of a force
  • 4. Types of Simple Machine PulleyScrew Inclined Plane Wedge Lever Wheel and axle
  • 5. Screw  mechanism that converts rotational motion to linear motion, and a torque (rotational force) to a linear force
  • 6. Pulley  A pulley is a wheel on an axle or shaft that is designed to support movement and change of direction of a cable or belt along its circumference.
  • 7. Inclined Plane  also known as a ramp, is a flat supporting surface tilted at an angle, with one end higher than the other, used as an aid for raising or lowering a load
  • 8. Wedge  triangular shaped tool, and is a portable inclined plane  can be used to separate two objects or portions of an object
  • 9. Lever  machine consisting of a beam or rigid rod pivoted at a fixed hinge, or fulcrum
  • 11. Class 1:  Fulcrum in the middle: the effort is applied on one side of the fulcrum and the resistance on the other side, for example, a seesaw, a crowbar or a pair of scissors. Mechanical advantage may be greater or less than 1.
  • 12. Class 2:  Resistance in the middle: the effort is applied on one side of the resistance and the fulcrum is located on the other side, for example, a wheelbarrow, a nutcracker, a bottle opener or the brake pedal of a car. Mechanical advantage is always greater than 1.
  • 13. Class 3:  Effort in the middle: the resistance is on one side of the effort and the fulcrum is located on the other side, for example, a pair of tweezers or the human mandible. Mechanical advantage is always less than 1.
  • 14. Wheel and Axle  The wheel and axle is generally considered to be a wheel attached to an axle so that these two parts rotate together in which a force is transferred from one to the other. In this configuration a hinge, or bearing, supports the rotation of the axle.
  • 15. Importance of Simple Machine  Screws - used to hold different parts of machines together.  Pulley - make it easier to pull a rope, to change the direction of a force, or to get more mechanical advantage and lift something heavier than you can lift by yourself.  Inclined plane - a load can be pulled up the plane by a sideways input force and heavy objects may be lifted.  Wedge - can take something apart that is really big and it is easier to move  Lever -helps you move something heavy, or make something go fast.  Wheel and Axle – used to lift weights.
  • 16. General Importance of Simple Machine  transferring a force from one place to another,  changing the direction of a force,  increasing the magnitude of a force, or  increasing the distance or speed of a force.