Which of the following is not an external force of change?
举一反三
- Which forces belong to external forces(). A: spring force B: damper force C: actuator force D: gravity force
- Which of the following expressions is not correct (不正确)? A: If a system is only acted by conservative forces （保守力）, the mechanical energy（机械能）must be conserved （守恒）. B: If net external force is zero then the linear momentum of the system must be conserved. C: If net external force is zero, then the mechanical energy of a system must be conserved. D: If net external force is zero, then the mechanical energy of a system may not be conserved.
- Which of the following best defines environmental uncertainty? A: the amount of innovation and creativity in an organization's internal environment B: the amount of resources and expertise in an organization's internal environment C: the amount of change and confidence in an organization's external environment D: the amount of change and complexity in an organization's external environment
- Stress is A: A. the force with which a structure resists an external load placed on it B: B. always greater than the external load causing it C: C. opposite in direction to the external load causing it
- The marketplace is an external force of change.