If a rigid body rotates about point o, the sum of the moments of the external forces acting on the body about point o equals which of the following?
a) ig a
b) io a
c) m ag
d) m ao

The answer to the question is A.

Explanation:

The definition of moment is Force multiplied the distance to the point of interest.

 So the external moment at point O is equal to ⇒ EMо= F×d

 Knowing the definition of moment of inercia (I) and a newtonian Force ( m.a)

We can say that te moment of the externals force at point O is EMо= IGa

Because the rotation of a body in a inmovil point is implicated by the moment of inercia an the action of the gravity in that moment.

explanation:

as the height from which the ruler was dropped increased, the speed of the ruler at ryan's hand increased.

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).