An object moves in simple harmonic motion with period 8 seconds and amplitude 2 cm. At time t=0 seconds, its displacement d from rest is -2 cm, and initially it moves in a positive direction. Give the equation modeling the displacement d as a function of time t.

A Ferris wheel has a radius of 30 m. Its center is 31 m above the ground. It rotates once every 40 s. Suppose you get on the bottom at t = 0. Write an equation that expresses your height as a function of elapsed time. Oh = 31 cos 2T- - O h = 30 cos 2T (t - 40) 40 = (t - 20) 40 Oh 31 cos 2T- = (t - 20) 40 (t – 20) 40 Oh 30 cos 2π- 2T +30 +1 +30 +31