11. Instrument used to measure force. A. Magnetic B. Spring Balance 12. Like poles repel, unlike poles attract. A. Gravitational B. Friction 13. Present in objects directly in contact. A. Friction B. Contact Force 14. Always opposes movement of objects. A. Friction B. Gravitational 15. Force that pulls you down. A. Force B. Magnetic C. Spring Balance D. Magnetic C. Magnetic D. Force C. Gravitational D. Friction​