Videos A to Z

• Force and Newton's Laws: Acceleration and mass

  
  • 3-5
  • 6-8
  • 9-12

  Objects of different masses fall at equal rates of acceleration.  » more info

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• Force and Newton's Laws: Law of Universal Gravitation

  
  • 3-5
  • 6-8
  • 9-12

  The law of universal gravitation states that all objects in the universe are attracted by the force of gravity. The law of universal gravitation is responsible for the moon remaining in orbit around Earth.  » more info

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• Force and Newton's Laws: Weight in space

  
  • 3-5
  • 6-8
  • 9-12

  This car would weigh less on the moon than it does on Earth because the force of gravity on the moon is less than the force of gravity on Earth. However, its mass is the same.  » more info

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• Forces in Fluids: Bernoulli principle

  
  • 3-5

  The ball is drawn to the rapidly moving stream of air because the stream has a lower pressure than the surrounding air. The Bernoulli principle states that the pressure in a moving stream of fluid is…  » more info

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• Forces in Fluids: Buoyancy

  
  • 3-5

  The weight of the object causes it to move downward in to the liquid. Fluid pressure also exerts a buoyant or upward force on the object. In this case, the upward force generally balances the downward…  » more info

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• Forces in Fluids: Car brake system

  
  • 3-5

  The piston exerts pressure on a type of fluid called brake fluid. In accordance with Pascal's principle, this pressure is transmitted equally to all parts of the liquid-filled brake system.  » more info

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• Forces in Fluids: Particles in fluids

  
  • 3-5

  Fluids are made of particles that are too small to be seen with the naked eye. Particles in fluids are constantly moving. As they collide with a surface, they exert a force on that surface.  » more info

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• Forces in Fluids: Pascal's Principle

  
  • 3-5

  Pascal's Principle states that when a force is applied to a confined liquid, an increase in pressure is transmitted equally to all parts of the fluid.  » more info

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• Forces Shaping the Earth: Anticline and syncline

  
  • 3-5
  • 6-8
  • 9-12

  Anticline folds are created by arching rock layers. Syncline folds are downward folds of rock layers.  » more info

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• Forces Shaping the Earth: Faulting video clip

  
  • 3-5
  • 6-8
  • 9-12

  Faulting is the process by which rock layers break when placed under stress.  » more info

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