A student swims at 4m/s. She is swimming from west to east across a river that's is flowing 2.2m/s [S].
A) if the river is 100 m wide, what is the quickest time that she can swim the entire width?
B) how far downstream will she be?
C) if she decides to go directly across the river, what direction should she swim?
D) how long will it take her to cross the river going this direction?
2 answers
quiz tomorrow on these type of questions I need help!!!!
a. d = V*t = 100 m.
4*t = 100.
t =25 s.
b. Tan A = Y/X = -2.2/4 = -0.550.
A = -28.8o = 28.8o S. of E.
Tan 28.8 = Y/X = d/100
d = 100*Tan28.8 = 55 m. downstream.
c. Direction = 28.8o N. of E. to offset
the current.
4*t = 100.
t =25 s.
b. Tan A = Y/X = -2.2/4 = -0.550.
A = -28.8o = 28.8o S. of E.
Tan 28.8 = Y/X = d/100
d = 100*Tan28.8 = 55 m. downstream.
c. Direction = 28.8o N. of E. to offset
the current.
1 answer