UCM Flashcards

Flashcards about Uniform Circular Motion and Gravitation

Angular Displacement (θ or Δθ)

Change in angle from 0 to θ. As the arc length increases the angle in the circle also increases. Δθ = Δx / r

Angular Velocity (ω)

Change in displacement with respect to an interval of time Δt. ω = v / r

Angular Acceleration (α)

Change in velocity with respect to an interval of time Δt. α = a / r, * a = rα refers to tangential acceleration

Period (T)

Time for 1 revolution. It is usually in seconds or second/revolution.

Frequency (f)

A quantity that is the reciprocal of Period . It is usually in radians per seconds or revolution/second. f = 1 / T

Angular Frequency (ωf)

The (average) angular velocity for a revolution. ωf = 2πf, ωf = 2π/T

Centripetal Force (FC)

The Net force that tends to deflect an object from moving in a straight path and causes to go in a circular path. This is directed to the axis of rotation.

Centripetal Acceleration (aC)

Also known as the radial acceleration. This is the acceleration associated with centripetal force and follow the NSLM, it also goes to the axis of rotation.

Universal Law of Gravitation

Every particle of matter in the universe attracts every other particle with a force that is directly proportional to the product of the masses of the particle and inversely proportional to the square of the distance between them.

Gravitational Force (FG)

Force between two objects due to gravity. FG = Gm₁m₂ / r²