Question

A buoy in the harbor of san juan,puerto rico, bobs up and down.The distance between the highest and lowest point is 3 feet.It moves from its highest point down to its lowest point and back to its highest point every 8 seconds.
a)Find the equation of the motion for the buoy assuming that it is at its equilibrium point at t=0 and the buoy is on its way down at that time.
b)Determine the height of the buoy at 3 seconds.
c)Determine the height of the buoy at 12 seconds.

Answer 1

http://www.freemathhelp.com/forum/archive/index.php/t-68685.html?s=81349e7c156e89af0e48100743b7ef6d

Answer 2

Nancy Lam u must see this link hope u would get it soon

Answer 3

I did see,but I still don't know answer

Answer 4

http://www.freemathhelp.com/forum/threads/68685-sin-and-cosine-graphing-word-problem?s=9340020b3bb45e0df07d0a9b5c5741cf

Answer 5

this one is good then the previous one

Answer 6

a) 3cospi/4 ?

Answer 7

f(t)=1.5*sin(pi*t/4)
f(3)=1.06 feet
f(12)=1.5sin(pi)=0

Answer 8

Noureldin amplitude is 1.5?

Answer 9

I don't get ,go up 3 and go down 3
or 3 include up and down ?

Answer 10

1.5 up and 1.5 down = 3 ?

Answer 11

thank your guy
Can some one help me one more
\[y=-3\sin\frac{\pi}{2}\theta\]
my answer: is period = 4, I positive correct but don't know how to graph

Answer 12

I don't get 4 is period how much degree ?

Answer 13

thank kushashwa23

Answer 14

my pleasure Nancy Lam