An Object Starts from Rest and Moves in a Straight

Multiple Choice

An object starts from rest and moves in a straight line with an acceleration of 2.0 m/s² for 3.0 seconds. It then reduces its acceleration to 1.0 m/s² for 5.0 additional seconds. The magnitude of the velocity is then

A) 51 m/s.
B) 38 m/s.
C) 11 m/s.
D) 9.0 m/s.
E) 7.6 m/s.