Technician A says that the diameter of a bolt is the same as the wrench size used to remove or install the fastener. Technician
B says that the length is measured from the top of the head of the bolt to the end of the bolt. which technician is correct ? A. Technician A only B. Technician B only C. Both techinicians A & B
Both technicians are wrong. The diameter of bolt is not based on the top where wrench used, but on the smaller part below, it called shanks. Wrench size also not based on the top diameter but the width across the flat. The calculation for the length of a bolt also will not include the top/head, it only includes the shanks.
and r=40 m, so we can re-arrange the previous equation to find the velocity of the car:
