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  1. What is acceleration? (article) | Khan Academy

    Velocity describes how position changes; acceleration describes how velocity changes. Two layers of change!

  2. The kinematic equations (article) | Khan Academy

    This equation can be derived by combining two equations for average velocity. Average velocity is defined as displacement divided by the time during which that displacement occurred:

  3. Acceleration (video) | 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 …

  4. Deriving displacement as a function of time, acceleration, and initial ...

    Displacement in physics is a vector quantity that measures the change in position of an object over a given time period. Learn how to calculate an object’s displacement as a function of time, constant …

  5. What is velocity? (article) | Khan Academy

    Police give tickets based on instantaneous velocity, but when calculating how long it will take to get from one place to another on a road trip, you need to use average velocity.

  6. Kinetic energy review (article) | Khan Academy

    Review the key concepts, equations, and skills for kinetic energy. Understand how kinetic energy can't be negative but the change in kinetic energy can be negative.

  7. Momentum (video) | Linear momentum | Khan Academy

    While both acceleration and change in momentum involve velocity and time, they are distinct quantities: acceleration is the rate of change of velocity, while the change in momentum is the product of mass …

  8. Calculating momentum changes - Solved example - Khan Academy

    The initial velocity can be positive or negative, depending on the direction of motion. Positive values indicate motion in one direction, while negative values indicate motion in the opposite direction.

  9. Visual understanding of centripetal acceleration formula

    The CIRCUMFERENCE is the FULL change in direction, so the ARC between two certain points on the circle is the change in direction from one point to the other. Now what is the change in direction or …

  10. Acceleration (video) | Motion | Khan Academy

    Yes! Here it is: a = (vf - vi) / t vf is the final velocity, vi is the initial velocity, and t is the time interval. Another way to express it is a = Δv / Δt, where Δv represents the change in velocity and Δt …