A system is testing some military HW which has an amplitude of 23cm and frequency of 55Hz. At time 0s it is at the origin.
At what time does it pass through 15cm?
When the speed is 200ms^-1 what is the position?
The Attempt at a Solution
omega = (2pi) * 55 = 346 r^s-1
max V = 23 * 346 = 7958 -- is that right??
To find the time, do I need to use trigonometry and the unit circle? No clues about the second one. Can SHM problems be found with the unit circle? Do I need to only use the SHM equations?
Should I think SHM in terms of the unit circle or movement going only up and down and not in a circle at all?
I'm really stuck, thanks for any help.