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Combining Forces

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Levels are CK-12's student achievement levels.
Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
At Grade (Proficient) Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.
Advanced Students matched to this level are ready for material that requires superior performance and mastery.
  • Real World Application
    Ollie Up

    Ollie Up

    by CK-12 //basic

    Discover the physics behind the skateboarding trick called the ollie and how the skater combines forces to do the trick.

  • Real World Application
    Tug of War

    Tug of War

    by CK-12 //basic

    Learn what forces are involved in the game of tug of war and how the game illustrates Newton's first law of motion.

  • Real World Application
    Speeding Up by Falling Down

    Speeding Up by Falling Down

    by CK-12 //basic

    Discover how to find the terminal velocity of a penny dropped from a skyscraper and whether the penny will be traveling fast enough by the time it reaches the ground to damage materials or harm people.

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