- #1

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I found the amplitude to be 11cm (this is 100% correct)

1) What is the glider's position at t= 26.0 s?

How do i do #1?

I used the formula x = A cos ( wt) and plugged everything in.

x = (11cm) cos (26sec x 2pie/1.5)

x = -3.56

but my answer is wrong :-(