A buoy floating in the sea is bobbing in simple harmonic motion with period 1 second and amplitude 11 in . Its displacement d from sea level at time t=0 seconds is 0in, and initially it moves downward. (Note that downward is the negative direction.)

incomplete question

Complete question:

A buoy floating in the sea is bobbing in simple harmonic motion with period 1 second and amplitude 11 in . Its displacement d from sea level at time t=0 seconds is 0in, and initially it moves downward. (Note that downward is the negative direction.). Give the equation modelling displacement(d) as a function of time(t)

d = -11sin2πt

Step-by-step explanation:

Given,

Amplitude = 11 in

Period = 1 seconds.

Since, d at t = 0 in

Let displacement be d =asin(wt+∅)

So, a = amplitude = -11 in (it moves downward)

w = angular velocity

= 2π/period

= 2π/1

= 2πrad/sec

Therefore, at t = 0

So, since sin(∅) = 0

∅ = 0

So, inputing values of a,∅, and w we get

d = -11sin(2πt + 0)

d = -11sin2πt

which expression can be used to convert 80 us dollars (usd) to australian dollars (aud)?

1 usd = 1.0343 aud

1 aud = 0.9668 usd

step-by-step explanation:

sorry just need the points