- #1

rabar789

- 22

- 0

## Homework Statement

The motion of an object is described by the equation

x = (0.90 m) cos(PI*t/5). I needed to find:

The position of the object at t = 0 and at t = 0.40 s;

I got (0.9) and (0.8718) meters, respectively, which were correct.

The amplitude (0.9 meters) was also correct.

I need to find the frequency (f) of motion.

## Homework Equations

x = (0.90 m) cos(PI*t/5)

omega=2(PI)f

## The Attempt at a Solution

Finding the frequency is the only thing I can't seem to figure out. I tried fiddling with the "cos(PI*t/5)" equation a few ways, but all of my answers are wrong. I think I may be just dividing by the wrong value or something. Could some one give me a head start? Thanks!