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Forces and Friction

  •   Game Code: 3285671
  •  English    26     Public
    Push and Pull |Forces | Friction
  •   Study   Slideshow
  • What is gravity?
    The force that pulls objects toward the center of the Earth
  •  25
  • Friction is a force that acts in an ___________ direction of movement.
    opposite
  •  15
  • How does friction affect speed?
    More friction decreases speed
  •  25
  • Is there more or less friction when the ground is slippery?
    Less friction
  •  25
  • When do you need to apply more force: pushing a heavy box on ice or grass? Why?
    Grass! You need more force to push an object on a rough surface than on a smooth one because of friction.
  •  25
  • Why is friction important?
    It allows us to walk, cars to drive, our hands to grab things, etc.
  •  25
  • Which surface creates the most friction with a skateboard: grass, wood, or stone?
    Grass
  •  20
  • What is the unit of measurement for force?
    Newton
  •  20
  • Mention 3 things around you that you can pull!
    Your friends and teacher will check your answer.
  •  25
  • Mention 3 things around you that you can push!
    Your friends and teacher will check your answer.
  •  25
  • Why does a person's weight change when they visit the moon?
    Because the gravitational field changes.
  •  20
  • Momentum is a characteristic that is dependent upon _______ and ___________.
    Mass and velocity
  •  15
  • How can someone reduce the amount of friction encountered by two objects surfaces?
    Apply lubrication; e.g. lotion, butter, oil, grease, etc.
  •  20
  • True or false: the Moon is stuck in orbit around the Earth due to Earth's gravity.
    True
  •  10
  • Who discovered gravity?
    Isaac Newton
  •  15
  • True or false? Gravity exists between all objects that have mass.
    True
  •  10
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