Question

CHECK MY ANSWERS???
An objects motion is describe by the equation d=3sin(8pi t)-2. the displacement d is measured in meter. the time t is measured in seconds.

a. what is the object position (in meter)at t=0?
I'm not sure, but I got -2?

b. what is the object maximum displacement(in meter) from its t=0 position?
3?

c. how much time(in sec) is required for one oscillation?
I got 1/4 sec?

d. what is the frequency(measured in Hz) of this oscillation
Not too sure how to do this...

Answer 1

This should help you check your answers.

http://www.wolframalpha.com/input/?i=d%3D3sin%288pi+t%29-2

Answer 2

could you explain how to find the frequency?? :o

Answer 3

Frequency is the measure of one cycle ( peak to peak or trough to trough).