Vascular resistance is the friction force that opposes blood flow in a blood vessel. what two factors are the most important in generating friction between blood and the walls of a vessel?

are there answer choices to this question? this seems like a question where you have options to choose from.

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.