Examples of Simple Machines used in everyday life

00:03:00
https://www.youtube.com/watch?v=_fOA4nCWYms

Ringkasan

TLDRThe video introduces the concept of work as energy to move objects, and explores six types of simple machines: levers, inclined planes, pulleys, wedges, screws, and wheels & axles, describing their practical applications. Additionally, it highlights the significance of friction, detailing its types (static, sliding, rolling, fluid) and its dual role in daily life—sometimes aiding movement and at other times being a hindrance. Examples include how friction helps while walking or using vehicles, as well as how lower friction is desired in specific scenarios like skating.

Takeaways

  • 🔧 Simple machines reduce effort needed for work.
  • ⚖️ Levers provide mechanical advantage based on beam length ratios.
  • 🛝 Inclined planes are flat surfaces raised at angles.
  • 🔗 Pulleys lift heavy objects with ease using a wheel and rope.
  • ⚒️ Wedges change force direction, like a nail or axe.
  • 🔩 Screws are inclined planes wrapped around a shaft.
  • 🛞 Wheels and axles make transportation easier.
  • ⚡ Friction resists motion between surfaces in contact.
  • ❄️ Low friction facilitates gliding, like on ice.
  • 🏎️ Race cars reduce drag with aerodynamic designs.

Garis waktu

  • 00:00:00 - 00:03:00

    Work refers to the energy needed to move an object, and the distance moved affects the amount of work done. Simple machines assist in performing the same work with less effort, with six types identified: lever, inclined plane, pulley, wedge, screw, and wheel and axle. These machines can be found in everyday items such as bikes, which utilize multiple simple machines like levers and pulleys for efficiency. The lever's mechanical advantage is determined by the lengths of the beam around its fulcrum, while inclined planes facilitate movement by raising a surface at an angle. Pulleys are wheels that use grooves to lift or lower heavy objects, commonly seen in cranes and cars. Wedges redirect force to perform tasks, as seen with nails and axes. Screws serve as inclined planes twisted around a shaft, and the wheel and axle make transportation of objects easier, essential for bicycles and wheelbarrows.

Peta Pikiran

Video Tanya Jawab

  • What is work?

    Work is the amount of energy necessary to move an object.

  • How do simple machines help with work?

    They allow you to do the same work with less effort.

  • What are the six simple machines?

    Lever, inclined plane, pulley, wedge, screw, wheel and axle.

  • What is friction?

    Friction is the force that opposes motion between surfaces in contact.

  • What are the types of friction?

    Static, sliding, rolling, and fluid friction.

  • Why is friction sometimes undesirable?

    High friction can hinder movement, like on ice or skate rinks.

  • How do race cars reduce fluid friction?

    They are designed to be sleek and aerodynamic.

  • What is the function of a pulley?

    A pulley lifts or lowers heavy objects.

  • What is an example of a wedge?

    An axe is an example of a wedge.

  • How does friction impact walking on ice?

    Friction is reduced, making it challenging to walk.

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Gulir Otomatis:
  • 00:00:00
    Work is the amount of energy necessary to move an object.
  • 00:00:03
    The further you move it, the more work is required.
  • 00:00:07
    Simple machines allow you to do the same work with less effort.
  • 00:00:11
    Simple machines are all around you.
  • 00:00:13
    These bikes incorporate three simple machines.
  • 00:00:16
    Welcome to MooMooMath and Science There are 6 simple machines
  • 00:00:22
    Lever Inclined Plane Pulley Wedge Screw Wheel Axle
  • 00:00:30
    If you start looking around you will find these simple machines in your everyday life.
  • 00:00:35
    Like this mountain bike uses three simple machines
  • 00:00:36
    A Lever is a long beam and a fulcrum, or pivot.
  • 00:00:40
    The mechanical advantage of the lever depends on the ratio of the lengths of the beam on
  • 00:00:44
    either side of the fulcrum.
  • 00:00:47
    Pulling out nail with pliers Bottle opener
  • 00:00:53
    Shovel Golf club
  • 00:00:58
    Cranks on a bicycle Wheel barrow and inclined plane
  • 00:01:05
    Inclined plane is simply a flat surface raised at an angle
  • 00:01:10
    Skateboard ramp Motorcycle jump
  • 00:01:17
    Steps considered an inclined plane A Pulley is simply a wheel with a groove in
  • 00:01:23
    it, and a rope in the groove..
  • 00:01:27
    It is used to lift up or lower heavy objects or propel a bike forward
  • 00:01:38
    Gears on a bicycle This crane uses a pulley
  • 00:01:45
    You will find pulleys on almost every car.
  • 00:01:49
    Wedge The main function of a wedge is to change the direction of the input force.
  • 00:01:54
    For example, if we drive a nail into a board the nail acts like a wedge and will redirect
  • 00:02:01
    this force outward, causing the nail to go into the wood and sometimes split the wood
  • 00:02:08
    Scissors lever and a wedge An axe is a wedge
  • 00:02:17
    Screw is essentially a long incline plane wrapped around a shaft,
  • 00:02:24
    Dril bolts
  • 00:02:31
    Wheel and axle is basically a wheel mounted to an axle Allows us to transport objects
  • 00:02:37
    much easier Bicycle has a wheel or axle
  • 00:02:44
    Wheel barrow Friction allows this person to climb these
  • 00:02:45
    boulders Friction is used to strike a match
  • 00:02:46
    Friction Friction is the force that opposes motion
  • 00:02:47
    between any surfaces that are in contact.
  • 00:02:48
    There are at least four types of friction: static, sliding, rolling, and fluid friction.
  • 00:02:49
    Static, sliding, and rolling friction occur between solid surfaces.
  • 00:02:50
    Fluid friction occurs in liquids and gases Static friction occurs when an object is resting
  • 00:02:51
    on a surface.
  • 00:02:52
    The static friction between the boots and the snow allows this person to stand and shovel
  • 00:02:53
    snow When you rub your hands together you experience
  • 00:02:54
    sliding friction.
  • 00:02:55
    When you ride a bike you depend on the rolling friction of the tires
  • 00:02:56
    sky diving depends on fluid friction between the air and the parachute to slow slow
  • 00:02:57
    Friction is used often in everyday life.
  • 00:02:58
    Sometimes you want alot of friction like the gripping power of tires and other times like
  • 00:02:59
    this skating rink you want lower friction so you can glide across the ice
  • 00:03:00
    Most land vehicles rely on friction for acceleration, deceleration and changing direction
  • 00:03:01
    Fluid friction contributes to aerodynamic drag, which is a resistance to the forward
  • 00:03:02
    motion of a body through a the air).
  • 00:03:03
    Race cars are sleek and aerodynamic to reduce this fluid friction
  • 00:03:04
    Your shoes provide friction which allows you to move forward
  • 00:03:05
    That is why it is challenging to walk or drive a car on ice.
  • 00:03:06
    The friction is reduced Skis on snow are possible because of low friction
  • 00:03:07
    Sandpaper works because its surface increases the amount of friction
  • 00:03:08
    Wax is applied to a surfboard to increase friction and grip
  • 00:03:09
    You put oil on chains in gear to decrease friction and it allows the chain to work more
  • 00:03:10
    efficiently The wheels on skateboard create a great deal
  • 00:03:11
    of friction and allows people to skate ramps
Tags
  • work
  • energy
  • simple machines
  • friction
  • lever
  • inclined plane
  • pulley
  • wedge
  • screw
  • wheel axle