Your friend's 1.41 gram graduation tassel hangs on a string from his rear-view mirror.
(a) When he accelerates from a stoplight, the tassel deflects backward toward the rear of the car hanging at an angle of 6.13 degree relative to the vertical. Determine the tension in the string holding the tassel.
(b) Determine at what angle to the vertical will the tension in the string be twice the weight of the tassel?