CBSE Class 11-science Answered

A flywheel is attached on a space craft for controlling the orientation of the space craft. When neither the flywheel nor the space craft is turning then the total angular momentum is zero. To change the orientation of the spacecraft, the flywheel is made to rotate. The spacecraft starts rotating in the opposite sense to maintain the angular momentum of the system zero.When the flywheel is brought to rest, the space craft also stops rotating.But the orientation of space craft changes.