A10 n board of uniform density is 5 meters long. it is supported on the left by a string bearing a 3 n upward force. in order to prevent the string from breaking, a person must place an upward force of 7 n at a position along the bottom surface of the board. at what distance from its left edge would they need to place this force in order for the board to be in static equilibrium?

the answer is 3.1 his answer is wrong mines is right

d₁ = displacement of tern from arctic to antarctic = 11000 miles

d₂ = displacement of tern from antarctic to arctic =   - 11000 miles

d = total displacement for the journey

total displacement for the journey is given as

d = d₁ + d₂

d = 11000 + (-11000)

d = 0 miles

t₁ = time of travel from arctic to antarctic = 3 months = 3 x 30 days = 90 days

t₂ = time of travel from antarctic to arctic = 3 months = 3 x 30 days = 90 days

t = total time of travel

total time of travel is given as

t = t₁ + t₂

t = 90 + 90

t = 180 days

average velocity is given as

average velocity = total displacement/ total time

v = d/t

v = 0/180

v = 0 miles/day