A 20-Kg Block Starts from Rest on the Positive X Axis

Multiple Choice

A 2.0-kg block starts from rest on the positive x axis 3.0 m from the origin and thereafter has an acceleration given by in m/s².The torque, relative to the origin, acting on it at the end of 2.0 s is:

A) 0 N∙m
B) (-18 N∙m)
C) (+24 N∙m)
D) (-144 N∙m)
E) (+144 N∙m)