#angular speed

An introduction of rotational motion and kinematics.

The linear variables of displacement (d), velocity (v), and acceleration (a) have their angular counterparts as well: Δθ, ω, and α. The Δθ term is the change of angle. To get the length it passes through, multiply it by the radius of the circle, s=rΔθ. As a note, the angle has to be given in radians for this to work. To convert from degrees to radians, use θrad=θdeg*π/180. The term s=rΔθ gives us…

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Angular v Linear Speed

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Cover page for rotational motion and the Law of Gravity.

We’ve covered linear motion, the motion of a straight line. There is also angular motion, motion that revolves around (rotates around) the center of a circle. This can also be referred to as rotational or circular motion. When combined with the laws of motion and gravitation, this can be used to describe the motions of: Moons around a planetPlanets, asteroids, and comets around a starStars…