Question

A 23.3-kg mass is attached to one end of a horizontal spring, with the other end of the spring fixed to a wall. the mass is pulled away from the equilibrium position (x = 0) a distance of 17.5 cm and released. it then oscillates in simple harmonic motion with a frequency of 8.38 hz. at what position, measured from the equilibrium position, is the mass 2.50 seconds after it is released?

Answer 1

16.64cm is the correct answer.

Don't round ω when entering cos(ω*T) in your calculator