Hi Billy
Forces that are equal in size but opposite in direction are called : Balanced forces.
The answer is : A
Good luck !
If you study a week before you should memorize & study the night & day of
All o the galaxies are moving in a same speed
Answer:
Tangential speed = 5.72 m/s
Centripetal acceleration = 
Explanation:
The tangential speed, V, is given by

where
is the angular speed and is given by
(f is the angular frequency or frequency of rotation)
Thus,

The centripetal acceleration,a, is given by

