the answer is right. its 56
C 9,9
the opposite of negative nine is positive nine
the absolute value of a number is the distance of that number from 0 on a number line so negative nine would equal positive nine as the absolute value
20+9 equals the twenty nine part but sorry I don’t know the five thousandths sorry
Answer:
γ = 13 lb.s/ft
Step-by-step explanation:
Weight = 13 lb
L = 1.5 inches = 0.125 ft
To determine the value of γ for which the system is critically damped.
We write the general equation for such a system
my" + γy' + ky = 0
And this is critically damped when the roots are equal, that is
γ² - 4km = 0
k = spring constant = (weight/L) = (13/0.125) = 104 lb/ft
m = (w/g) = (13/32.2) = 0.404 lb.s²/ft
γ² - 4km = 0
γ² - 4(104)(0.404) = 0
γ² = 168.604
γ = 12.98 = 13 lb.s/ft
