The point of the needle of a sewing machine moves in SHM along the x-axis with a frequency of 2.5 Hz. At t=0 its position and velocity components are +1.1cm and -15cm/s.
(A) Find the acceleration component of the needle at t=0.
(B) Write equation giving the position component of the point as a function of time.
(C) Write equation giving the velocity component of the point as a function of time.
(D) Write equation giving the acceleration component of the point as a function of time.