Acylindrical blood vessel is partially blocked by the buildup of plaque. at one point, the plaque decreases the diameter of the vessel by 69.0 %. the blood approaching the blocked portion has speed v 0 . just as the blood enters the blocked portion of the vessel, what is its speed v , expressed as a multiple of v 0

10.4 times of initial velocity

Explanation:

Given

Diameter reduced by 69 %

it approaches with velocity

suppose its velocity is v during blocked passage

suppose d is the initial diameter and diameter is

As flow is constant

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.