5. גוף נע על משטח נטוי לא חלק
5.3. זווית נטייה להתמדה
כדי למצוא את זווית נטיית המישור שבה הגוף מתמיד , נשתמש בביטוי תאוצת גוף הנע במורד מישור משופע נטוי לא חלק.
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כאשר הגוף מתמיד תאוצתו שווה לאפס. נמצא את זווית נטיית המישור במצב זה:
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