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  • What is acceleration? (article) | Khan Academy
    That means that the direction of the acceleration determines whether you will be adding to or subtracting from the velocity Mathematically, a negative acceleration means you will subtract from the current value of the velocity, and a positive acceleration means you will add to the current value of the velocity
  • What is velocity? (article) | Khan Academy
    Your notion of velocity is probably similar to its scientific definition You know that a large displacement in a small amount of time means a large velocity and that velocity has units of distance divided by time, such as miles per hour or kilometers per hour Average velocity is defined to be the change in position divided by the time of travel
  • Curl, fluid rotation in three dimensions - Khan Academy
    Curl is an operator which measures rotation in a fluid flow indicated by a three dimensional vector field
  • What is Newtons first law? (article) | Khan Academy
    Once the net force is zero, the velocity—both magnitude and direction—must be constant Because of Newton's first law, the space probe moves in a straight line at constant speed The fact that there was a vertical force on the space probe does not affect the horizontal velocity of the space probe, it only changes the vertical velocity
  • Acceleration (video) | Kinematics (Motion) | Khan Academy
    Acceleration (a) is the change in velocity (Δv) over the change in time (Δt), represented by the equation a = Δv Δt This allows you to measure how fast velocity changes in meters per second squared (m s^2) Acceleration is also a vector quantity, so it includes both magnitude and direction
  • Wave characteristics review (article) | Khan Academy
    Review the characteristics of periodic transverse and longitudinal waves such as wavelength, crest, trough, amplitude, expansion, and compression
  • Divergence (article) | Khan Academy
    Learn about divergence in multivariable calculus, its definition, and applications in this comprehensive article by Khan Academy
  • Introduction to momentum (video) | Khan Academy
    Momentum (P) is equal to mass (M) times velocity (v) But there are other ways to think about momentum! Force (F) is equal to the change in momentum (ΔP) over the change in time (Δt) And the change in momentum (ΔP) is also equal to the impulse (J) Impulse has the same units as momentum (kg*m s or N*s)
  • Learn and try: The kinematic equations (article) | Khan Academy
    Learn what the kinematic equations are and how you can use them to analyze scenarios involving constant acceleration
  • Learn and try: Vectors in 2D (article) | Khan Academy
    A paper airplane is moving with a horizontal velocity of v x = 7 m s and a vertical velocity of v y = 4 m s Which vector represents the total velocity of the paper airplane? Assume a coordinate system in which right and up are the positive directions





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