What is the equation for rotational motion?

Tangential Velocity;

V=2πr/time where r is the radius of the motion path and T is the period of the  motion

AngularVelocity;

ω=2π/T=2πf where T is the period of the  motion and f is the frequency

Angular Acceleration (Centripetal Acceleration);

or 

where ω is the angular velovity, r is the radius and v is the tangential velocity 

Centripetal Force;

Fc=-m4π²r/T² or Fc=mv²/r

Where, T is the the period, V is the tangential velocity and m is the mass of the object

Torque;

Τ=Applied Force.Distance.sinΘ

Τ=F.d.sinΘ

i think the answer is a, hope this is right, that would be my best guess.

speed

ratio of distance traveled to time interval

net force

vector sum of forces on object

object

source of diverging light rays either luminous or illuminated

don't remove my answer im trying my best to answer them

explanation: