The problem that follow involve straight-line motion. The time t is in seconds unless othe...

The problem that follow involve straight-line motion. The time t is in seconds unless otherwise stated.

Problem

The astronaut is not rotating. He has an orientation control system that can subject him to a constant angular acceleration of 0.1 rad/s about die vertical axis in either direction. If he wants to rotate 180° about the vertical axis (that is. rotate so that he is facing toward the left) and not be rotating in his new orientation, what is the minimum lime in which he could achieve the new orientation?