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Review Friction

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  • Did it stop quickly?
    gravity
    low friction
    high friction
  • If a surface is rough there will be more friction.
    true
    false
  • Type of friction force that happens when a body moves through water.
    Fluid resistance
  • Is the friction more or less when the ground is bumpy (not flat)?
    More! Smooth flat surfaces have less or no bumps and they make it easier to push objects.
  • ... is the force of gravity on a person or object at the surface of a planet.
    Weight
  • True or False: Lighter objects require less force to stop than heavier objects.
    True.
  • If an object is heavy there will be more friction.
    true
    false
  • A smooth surface will has more friction.
    false
    true
  • What is the type of force when 2 surfaces rub together?
    Friction
  • A slide has _____ friction.
    high
    low
  • Did it go far?
    high friction
    low friction
  • When the ball slides and stops it is _____.
    friction.
  • ... takes place when an object touches other object.
    Friction
  • True or False: Friction allows us to grip objects and to stand up.
    True.
  • True or False: Heavier objects require more force to move and stop.
    True
  • Gravity keeps ________ orbiting around the Sun.
    planets
  • It is ______ if I drop a ball.
    gravity
  • True or False: Friction speeds up moving objects.
    False: Friction slows down moving objects.
  • If an object is light there will be less friction.
    true
    false
  • An object can change its motion from rolling friction into....
    Sliding friction
  • Is it easier to stop a bike on a sunny day or a rainy day?
    It's easier to brake on a sunny day, ground is slippery on rainy days, so you get less friction = harder to stop.
  • What is the thing that keeps everything on Earth from flying into the air?
    The force of Gravity (not friction!)
  • What is a force?
    A push or pull applied to an object.