07 - What is Instantaneous Velocity?, Part 1 (Instantaneous Velocity Formula & Definition)

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Learn what instantaneous velocity is, why it is important, and how to calculate it in physics. We begin by discussing average velocity, and demonstrate that the instantaneous velocity at any point in time is the slope of the line tangent to the position-time graph at that point.
Specifically, we take the slope of this line as the limit when the change in time approaches zero. This is explained to be the basic definition of the derivative in calculus 1. Because of this, instantaneous velocity is used heavily in physics, mechanics, and calculus.

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What do you mean 'velocity right now'? Velocity can be measured only during some period of time. At an instant distance is not changing. Is it something that is created to ease calculation, but does not exist in reality?

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This is easy, what grade do you learn this because I'm in grade 8 and I don't know when you start calculus

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