
What is velocity? (article) | Khan Academy
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.
Velocity vs. time graphs (article) | Khan Academy
Learn how to interpret the motion of an object represented on a velocity vs. time graph.
Position vs. time graphs (article) | Khan Academy
If the slope of the graph is positive (tilted up), the object had positive velocity at that time. At any time the position and velocity may both be positive, both be negative, or have different signs. It's very easy to …
Calculating average velocity or speed (video) | Khan Academy
Although speed and velocity are often words used interchangeably, in physics, they are distinct concepts. Velocity (v) is a vector quantity that measures displacement (or change in position, Δs) …
What is acceleration? (article) | Kinematics | Khan Academy
Acceleration is the name we give to any process where the velocity changes. Since velocity is a speed and a direction, there are only two ways for you to accelerate: change your speed or change your …
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:
Instantaneous speed and velocity (video) | Khan Academy
Learn how to find an object’s instantaneous speed or velocity in three ways - by using calculus, by looking at the slope of a given point on a graph of an object’s rate vs. time, or by using kinematic …
Free fall (article) | Kinematics | Khan Academy
The slope of a position vs. time graph equals velocity. Since the ball was dropped , the initial velocity is zero. As the object falls, its velocity is negative and increasing. So, the slope of our graph should …
Angular velocity and speed (video) | Khan Academy
There's multiple ways to approach these types of questions, but the big takeaway here is one, how we calculated angular velocity, and then how we can relate angular velocity to speed.
Relative velocity (video) | Khan Academy
Velocity depends on the point of view we take. Let's discuss what relative velocity is and how to visualize it.