Kinematics 4. Guideline for selection of moving point: In general, the contact point between the drive and driven objects is usually selected as moving point, which moves relative to both SCS and MCs 5. Guideline for MCS selectio A MCS Should be a coordinate system(object)on which the trajectory of the moving point is known or clear Explanation of the concepts by examples Moving point: Point a on rod aB MCS: Fixed to cam C′ SCS: Fixed to the ground9 Explanation of the concepts by examples: 4. Guideline for selection of moving point : In general, the contact point between the drive and driven objects is usually selected as moving point, which moves relative to both SCS and MCS. 5． Guideline for MCS selection: A MCS should be a coordinate system (object) on which the trajectory of the moving point is known or clear. Moving point: MCS: SCS： Point A on rod AB Fixed to cam Ｏ' Fixed to the ground