The slider P can be moved inward by means of the string 5, While the slotted arm rotates about point 0. The angular position of the arm is given by 9 = 0.57t- 0.031t2, where 6 is in radians and tis in seconds.The slider is at r = 1.35 m when t= O and thereafter is drawn inward at the constant rate of 0.18 m/s. Determine the velocity v and acceleration a of the slider when t = 2.8 5. Express your answers in the xy coordinate system. Answers: At t= 2.8 s