أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
one hundred twenty degrees
Newton's third law of motion is naturally applied to collisions between two objects. In a collision between two objects, both objects experience forces that are equal in magnitude and opposite in direction.
then the angle between two force is :180 deg
the2 forces must be
perpendiculer