NCES.PSc.1.2 - Understand the relationship between forces and motion.
- NCES.PSc.1.2.1 - Explain how gravitational force affects the weight of an object and the velocity of an object in freefall.
- NCES.PSc.1.2.2 - Classify frictional forces into one of four types: static, sliding, rolling, and fluid.
- NCES.PSc.1.2.3 - Explain forces using Newton's three laws of motion.