Speed (or rate, r) is a scalar quantity that measures the distance traveled (d) over the change in time (Δt), represented by the equation r = d/Δt. Created by Sal Khan.

Oops. Something went wrong. Please try again. Uh oh, it looks like we ran into an error. You need to refresh. If this problem persists, tell us.

In this video David shows how to determine the equation of a wave, how that equation works, and what the equation represents.

Like all forms of energy, kinetic energy is a scalar quantity. It has magnitude only, no direction, and cannot be less than zero. The equation for K includes speed which is a scalar, NOT …

We can describe acceleration as the change in velocity over time, and we can use the shorthand equation a = Δ v / Δ t to represent this relationship where ‘a’ is the average acceleration, ‘v’ is …

Practice using the wave speed equation for word problems to find the frequency and wavelength of a wave.

Let's learn what average speed & velocity are using some examples. Created by Mahesh Shenoy.

Displacement is basically the vector form of distance, and we know distance is speed x time. So displacement is velocity (vector form of speed) x time, which is what’s plotted on the graph.

If I have it R squared over R, well, that's just going to simplify to an R, so there we have it, we have our formula for the magnitude of our centripetal acceleration in terms of the magnitude of …

To get the speed of the object just multiply the radius of the path by the angular speed of the object. To get the tangential acceleration multiply the radius of the path by the angular …