Statics
ورقة مفاهيم Statics للصف الثالث الثانوي 2026.. بصيغة pdf
أعلنت وزارة التربية والتعليم والتعليم الفني عن إتاحة ورقة مفاهيم Statics للصف الثالث الثانوي 2026 عبر موقعها الإلكتروني الرسمي لمساعدة طلاب شهادة الثانوية العامة بمدارس اللغات في مراجعة المادة بمرونة كاملة وتأهيلهم لخوض الامتحانات النهائية دون الحاجة لحفظ القوانين الرياضية المعقدة التي يشملها المنهج الدراسي الرسمي.
ورقة مفاهيم استاتيكا لغات تالتة ثانوي 2026
تهدف هذه الخطوة الحكومية إلى تقديم الدعم التعليمي المباشر وتوحيد المصادر الرسمية التي يعتمد عليها الطلاب داخل اللجان الامتحانية، حيث تشتمل الكراسة الوزارية على ملخص مكثف لكافة الوحدات والقوانين الرئيسية المقررة في المادة لتوفير وقت الجهد الذهني وتوجيهه نحو التطبيق والحل.
ويشمل المحتوى التفصيلي المفرغ بدقة من الأوراق الرسمية المعتمدة ما يلي:
Unit One: Friction
The smooth surfaces:
The friction force is completely vanished and the coefficient of friction = zero.
The rough surfaces:
The friction force is appeared, and the coefficient of friction equal a real positive number.
Reaction:
In case the smooth planes the reaction is to be perpendicular on the surface of the common tangent of the touching bodies.
In case of rough planes, the direction of the reaction is unspecified, and it is depended on the nature of the touching surfaces and the other forces which acts on the body.
The static friction force appears when the two surfaces are sliding or about to move and its direction is in opposite direction to the direction of the body tends to move, and it is given by the inequality:
<span class="math">0 < F ≤ μ<sub>s</sub>N</span> where <span class="math">μ<sub>s</sub></span> is the static coefficient of friction.
The limiting static friction force: when the force of friction become the limiting static friction (<span class="math">F<sub>s</sub></span>) the body is about to move (without moving) and the friction is limiting and we symbolize it by (<span class="math">F<sub>s</sub></span>) and <span class="math">F<sub>s</sub> = μ<sub>s</sub>N</span>.
Kinetic friction force: If a body moves on a rough plane, then it is subject to a kinetic friction force its direction is opposite to its motion and the value of it is given by the relation:
<span class="math">F<sub>k</sub> = μ<sub>k</sub>N</span> where <span class="math">μ<sub>k</sub></span> is the kinetic coefficient of friction.
Notes on coefficients of static and kinetic friction:
<span class="math">μ<sub>s</sub></span> , <span class="math">μ<sub>k</sub></span> depend on the nature of the body and the surface and not depended on the areas of the contiguous surfaces of the mass of the moving body.
Coefficient of static friction (<span class="math">μ<sub>s</sub></span>) > Coefficient of kinetic friction (<span class="math">μ<sub>k</sub></span>).
The resultant reaction: the resultant reaction (<span class="math">R'</span>) is the resultant of the normal reaction <span class="math">N</span> and the friction force <span class="math">F<sub>s</sub></span>.
Angle of friction: the angle which included between the normal reaction and the resultant reaction when the friction is limiting.
The relation between coefficient of friction and angle of friction: when the friction is limiting, then the coefficient of friction equals the tangent of the angle of friction.
The relation between the measure of angle of friction and the measure of the angle of inclination of the plane to the horizon:
If a body is placed on a rough inclined plane and the body is about to slide under the effect of its weight only, then the measure of the angle of inclination of the plane to the horizontal equals to the measure of the angle of friction.
