Mar 12 • 🎯 Training Strategies
Mini Lesson: The normal force is not always equal to gravity. 🎯
This trips up almost every Physics 1 student at some point.
On a flat surface with no acceleration: yes, normal force equals mg.
But the moment you add an incline, acceleration, or an extra applied force, that changes everything.
Normal force is whatever it needs to be to keep the object from passing through the surface. You calculate it, you don't assume it.
Test yourself: a 10.0 kg box sits on a scale in an elevator accelerating upward at 2.00 m/s². What does the scale read? Reply below with your answer and your reasoning.
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Mini Lesson: The normal force is not always equal to gravity. 🎯
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